And what prevented the people from believing when guidance came to them (17:94)

Almuntakhab Fi Tafsir Alquran Alkarim

In effect nothing holds back the people and hinder them from conforming to Islam as ordained by Allah despite sending Messengers to guide them but their presumption upon Providence. Is it conceivable, they say, That Allah sends to the people a human Messenger

Tafseer Tafheem-ul-Quran by Syed Abu-al-A'la Maududi

(17:94) Whenever Guidance came before the people nothing prevented them from believing in it except this (excuse): they said: "Did Allah send a human being as His Messenger?" *107

And what prevented the people from believing when guidance came to them meaning

*107) It implies that this misunderstanding has always been cammon among the ignorant people of every age that a human being could not be a Messenger of Allah: They rejected a Messenger just because he was a human being and took his meals and had wife and children like themselves. In contrast to this, after the passage of the time the credulous followers of a Messenger began to claim that he was not a human being at all because he was a Messenger. That is why some people made their Messenger their God, others the son of God and still others the incarnation of God. In short, the ignorant people had never been able to understand that a human being could be a Messenger of Allah.
 

And what prevented the people from believing when guidance came to them meaning in Urdu

لوگوں کے سامنے جب کبھی ہدایت آئی تو اس پر ایمان لانے سے اُن کو کسی چیز نے نہیں روکا مگر اُن کے اِسی قول نے کہ "کیا اللہ نے بشر کو پیغمبر بنا کر بھیج دیا؟"