Allah said,

﴿مَن كَانَ عَدُوًّا لِّجِبْرِيلَ فَإِنَّهُ نَزَّلَهُ عَلَى قَلْبِكَ بِإِذْنِ اللَّهِ﴾

(Whoever is an enemy to Jibril (Gabriel) (let him die in his fury), for indeed he has brought it (this Qur'an) down to your heart by Allah's permission,) meaning, whoever becomes an enemy of Jibril, let him know that he is Ruh Al-Qudus who brought down the Glorious Dhikr (Qur'an) to your heart from Allah by His leave. Hence, he is a messenger from Allah. Whoever takes a messenger as an enemy, will have taken all the messengers as enemies. Further, whoever believes in one messenger, is required to believe in all of the messengers. Whoever rejects one messenger, he has rejected all of the messengers. Similarly, Allah said,

﴿إِنَّ الَّذِينَ يَكْفُرُونَ بِاللَّهِ وَرُسُلِهِ وَيُرِيدُونَ أَن يُفَرِّقُواْ بَيْنَ اللَّهِ وَرُسُلِهِ وَيقُولُونَ نُؤْمِنُ بِبَعْضٍ وَنَكْفُرُ بِبَعْضٍ﴾

(Verily, those who disbelieve in Allah and His Messengers and wish to make distinction between Allah and His Messengers (by believing in Allah and disbelieving in His Messengers) saying, "We believe in some but reject others.'') (4:150)

Allah decreed that they are disbelievers, because they believe in some Prophets and reject others. This is the same with those who take Jibril as an enemy, because Jibril did not choose missions on his own, but by the command of his Lord,

﴿وَمَا نَتَنَزَّلُ إِلاَّ بِأَمْرِ رَبِّكَ﴾

(And we (angels) descend not except by the command of your Lord) (19: 64), and,

﴿وَإِنَّهُ لَتَنزِيلُ رَبِّ الْعَـلَمِينَ - نَزَلَ بِهِ الرُّوحُ الاٌّمِينُ - عَلَى قَلْبِكَ لِتَكُونَ مِنَ الْمُنْذِرِينَ ﴾

(And truly, this (the Qur'an) is a revelation from the Lord of all that exists. Which the trustworthy Ruh (Jibril) has brought down. Upon your heart (O Muhammad ) that you may be (one) of the warners) (26:192-194).

Al-Bukhari reported that Abu Hurayrah said that the Messenger of Allah said,

«مَنْ عَادَى لِي وَلِيًّا فَقَدْ بَارَزَنِي بِالْحَرْب»

(Allah said, `Whoever takes a friend of Mine as an enemy, will have started a war with Me.)

Therefore, Allah became angry with those who took Jibril as an enemy. Allah said,

﴿مَن كَانَ عَدُوًّا لِّجِبْرِيلَ فَإِنَّهُ نَزَّلَهُ عَلَى قَلْبِكَ بِإِذْنِ اللَّهِ مُصَدِّقًا لِّمَا بَيْنَ يَدَيْهِ﴾

(Whoever is an enemy to Jibril (Gabriel) (let him die in his fury), for indeed he has brought it (this Qur'an) down to your heart by Allah's permission, confirming what came before it) meaning, the previous Books,

﴿وَهُدًى وَبُشْرَى لِلْمُؤْمِنِينَ﴾

(and guidance and glad tidings for the believers) meaning, as guidance to their hearts and bringer of the good news of Paradise, which is exclusively for the believers. Similarly, Allah said,

﴿قُلْ هُوَ لِلَّذِينَ ءَامَنُواْ هُدًى وَشِفَآءٌ﴾

(Say: "It is for those who believe, a guide and a healing.'') (41:44), and,

﴿وَنُنَزِّلُ مِنَ الْقُرْءَانِ مَا هُوَ شِفَآءٌ وَرَحْمَةٌ لِّلْمُؤْمِنِينَ﴾

(And We send down of the Qur'an that which is a healing and a mercy to those who believe) (17:82).

Allah then said,

﴿مَن كَانَ عَدُوًّا لّلَّهِ وَمَلـئِكَتِهِ وَرُسُلِهِ وَجِبْرِيلَ وَمِيكَـلَ فَإِنَّ اللَّهَ عَدُوٌّ لِّلْكَـفِرِينَ ﴾

(Whoever is an enemy to Allah, His Angels, His Messengers, Jibril and Mika'il (Michael), then verily, Allah is an enemy to the disbelievers.)

Allah stated that whoever takes Him, His angels and messengers as enemies, then...Allah's messengers include angels and men, for Allah said,

﴿اللَّهُ يَصْطَفِى مِنَ الْمَلَـئِكَةِ رُسُلاً وَمِنَ النَّاسِ﴾

(Allah chooses Messengers from angels and from men) (22:75). Allah said,

﴿وَجِبْرِيلَ وَمِيكَـلَ﴾

(Jibril (Gabriel) and Mika'il (Michael)). Allah mentioned Jibril and Mika'il specifically - although they are included among the angels who were messengers - only because this Ayah was meant to support Jibril the emissary between Allah and His Prophets. Allah also mentioned Mika'il here, because the Jews claimed that Jibril was their enemy and Mika'il was their friend. Allah informed them that whoever is an enemy of either of them, then he is also an enemy of the other as well as Allah. We should state here that Mika'il sometimes descended to some of Allah's Prophets, although to a lesser extent than Jibril, because this was primarily Jibril's task, and Israfil is entrusted with the job of blowing the Trumpet for the commencement of Resurrection on the Day of Judgment. It is recorded in the Sahih that whenever the Messenger of Allah would wake up at night, he would supplicate,

«اللَّهُمَّ رَبَّ جِبْرَائِيلَ وَمِيكَائِيلَ وَإِسْرَافِيلَ فَاطِرَ السَّمَوَاتِ وَالْأَرْضِ عَالِمَ الْغَيْبِ وَالشَّهَادَةِ، أَنْتَ تَحْكُمُ بَيْنَ عِبَادِكَ فِيمَا كَانُوا فِيهِ يَخْتَلِفُونَ، اهْدِنِي لِمَا اخْتُلِفَ فِيهِ مِنَ الْحَقِّ بِإِذْنِكَ إِنَّكَ تَهْدِي مَنْ تَشَاءُ إِلى صِرَاطٍ مُسْتَقِيم»

(O Allah, Lord of Jibril, Mika'il and Israfil, Creator of the heavens and earth and Knower of the seen and the unseen! You judge between Your servants regarding what they differ in, so direct me to the truth which they differ on, by Your leave. Verily, You guide whom You will to the straight path.)

Allah's statement,

﴿فَإِنَّ اللَّهَ عَدُوٌّ لِّلْكَـفِرِينَ﴾

(then verily, Allah is an enemy to the disbelievers) informed the disbelievers that whoever takes a friend of Allah as an enemy, then he has taken Allah as an enemy, and whoever treats Allah as an enemy, then he shall be Allah's enemy. Indeed, whoever is an enemy of Allah then he will lose in this life and the Hereafter, as stated earlier;

«مَنْ عَادَى لِي وَلِيًّا فَقَدْ آذَنْتُهُ بِالْمُحَارَبَة»

(Whoever takes a friend of Mine as an enemy, I shall wage war on him.)

﴿وَلَقَدْ أَنزَلْنَآ إِلَيْكَ ءَايَـتٍ بَيِّنَـتٍ وَمَا يَكْفُرُ بِهَآ إِلاَّ الْفَـسِقُونَ - أَوَكُلَّمَا عَـهَدُواْ عَهْدًا نَّبَذَهُ فَرِيقٌ مِّنْهُم بَلْ أَكْثَرُهُمْ لاَ يُؤْمِنُونَ - وَلَمَّا جَآءَهُمْ رَسُولٌ مِّنْ عِندِ اللَّهِ مُصَدِّقٌ لِّمَا مَعَهُمْ نَبَذَ فَرِيقٌ مِّنَ الَّذِينَ أُوتُواْ الْكِتَـبَ كِتَـبَ اللَّهِ وَرَآءَ ظُهُورِهِمْ كَأَنَّهُمْ لاَ يَعْلَمُونَ - وَاتَّبَعُواْ مَا تَتْلُواْ الشَّيَـطِينُ عَلَى مُلْكِ سُلَيْمَـنَ وَمَا كَفَرَ سُلَيْمَـنُ وَلَـكِنَّ الشَّيْاطِينَ كَفَرُواْ يُعَلِّمُونَ النَّاسَ السِّحْرَ وَمَآ أُنزِلَ عَلَى الْمَلَكَيْنِ بِبَابِلَ هَـرُوتَ وَمَـرُوتَ وَمَا يُعَلِّمَانِ مِنْ أَحَدٍ حَتَّى يَقُولاَ إِنَّمَا نَحْنُ فِتْنَةٌ فَلاَ تَكْفُرْ فَيَتَعَلَّمُونَ مِنْهُمَا مَا يُفَرِّقُونَ بِهِ بَيْنَ الْمَرْءِ وَزَوْجِهِ وَمَا هُم بِضَآرِّينَ بِهِ مِنْ أَحَدٍ إِلاَّ بِإِذْنِ اللَّهِ وَيَتَعَلَّمُونَ مَا يَضُرُّهُمْ وَلاَ يَنفَعُهُمْ وَلَقَدْ عَلِمُواْ لَمَنِ اشْتَرَاهُ مَا لَهُ فِى الاٌّخِرَةِ مِنْ خَلَـقٍ وَلَبِئْسَ مَا شَرَوْاْ بِهِ أَنفُسَهُمْ لَوْ كَانُواْ يَعْلَمُونَ - وَلَوْ أَنَّهُمْ ءَامَنُواْ واتَّقَوْا لَمَثُوبَةٌ مِّنْ عِندِ اللَّهِ خَيْرٌ لَّوْ كَانُواْ يَعْلَمُونَ ﴾

(99. And indeed We have sent down to you manifest Ayat and none disbelieve in them but Fasiqun (those who rebel against Allah's command).) (100. Is it not (the case) that every time they make a covenant, some party among them throw it aside Nay! (the truth is:) most of them believe not.) (101. And when there came to them a Messenger from Allah (i.e. Muhammad ) confirming what was with them, a party of those who were given the Scripture threw away the Book of Allah behind their backs as if they did not know!) (102. They followed what the Shayatin (devils) gave out (falsely of the magic) in the lifetime of Sulayman (Solomon). Sulayman did not disbelieve, but the Shayatin (devils) disbelieved, teaching men magic and such things that came down at Babylon to the two angels, Harut and Marut, but neither of these two (angels) taught anyone (such things) till they had said, "We are for trial, so disbelieve not (by learning this magic from us).'' And from these (angels) people learn that by which they cause separation between man and his wife, but they could not thus harm anyone except by Allah's leave. And they learn that which harms them and profits them not. And indeed they knew that the buyers of it (magic) would have no share in the Hereafter. And how bad indeed was that for which they sold their own selves, if they but knew.) (103. And if they had believed and guarded themselves from evil and kept their duty to Allah, far better would have been the reward from their Lord, if they but knew!)