Allah tells us that the idolators wondered at the sending of the Messenger of Allah as a bringer of glad tidings and a warner. This is like the Ayah:
﴿أَكَانَ لِلنَّاسِ عَجَبًا أَنْ أَوْحَيْنَآ إِلَى رَجُلٍ مِّنْهُمْ أَنْ أَنذِرِ النَّاسَ وَبَشِّرِ الَّذِينَ ءامَنُواْ أَنَّ لَهُمْ قَدَمَ صِدْقٍ عِندَ رَبِّهِمْ قَالَ الْكَـفِرُونَ إِنَّ هَـذَا لَسَـحِرٌ مُّبِينٌ ﴾
(Is it a wonder for mankind that We have sent Our revelation to a man from among themselves (saying): "Warn mankind, and give good news to those who believe that they shall have with their Lord the rewards of their good deeds'' (But) the disbelievers say: "This is indeed an evident sorcerer!'') (10:2). And Allah says here:
﴿وَعَجِبُواْ أَن جَآءَهُم مٌّنذِرٌ مِّنْهُمْ﴾
(And they wonder that a warner has come to them from among themselves.) meaning, a human being like themselves.
﴿وَقَالَ الْكَـفِرُونَ هَـذَا سَـحِرٌ كَذَّابٌأَجَعَلَ الاٌّلِهَةَ إِلَـهاً وَحِداً﴾
(And the disbelievers said: "This is a sorcerer, a liar. Has he made the gods into One God'') meaning, does he claim that the One Who is to worshipped is One and there is no god besides Him The idolators -- may Allah curse them -- denounced that and were amazed at the idea of giving up Shirk, because they had learned from their forefathers to worship idols and their hearts were filled with love for that. When the Messenger called them to rid their hearts of that and to worship Allah Alone, this was too much for them and they were astounded by it. They said:
﴿أَجَعَلَ الاٌّلِهَةَ إِلَـهاً وَحِداً إِنَّ هَـذَا لَشَىْءٌ عُجَابٌ وَانطَلَقَ الْمَلأُ مِنْهُمْ﴾
("Has he made the gods into One God Verily, this is a curious thing!'' And the leaders among them went about) meaning the chiefs and masters and nobles,
﴿امْشُواْ﴾
((saying): "Go on...'') meaning, `persist in your religion,'
﴿وَاْصْبِرُواْ عَلَى ءَالِهَتِكُمْ﴾
(and remain constant to your gods!), meaning, `do not respond to Muhammad's call to Tawhid.'
﴿إِنَّ هَـذَا لَشَىْءٌ يُرَادُ﴾
(Verily, this is a thing designed!) Ibn Jarir said, "The Tawhid to which Muhammad is calling you is something by which he wishes to gain power over you, and exalt his own position, so that he will have followers among you, but we will not respond to him.''