﴿ وَإِنَّهُمْ لَيَصُدُّونَهُمْ عَنِ ٱلسَّبِيلِ وَيَحْسَبُونَ أَنَّهُم مُّهْتَدُونَ ﴾

“whereupon, behold, these [evil impulses] bar all such from the path [of truth], making them think that they are guided aright!”

And indeed they that is the devils bar them the blind from the way from the path of guidance while they suppose that they are rightly guided the plural muhtadūna takes into account the potentially plural sense of man ‘whoever’ of the previous verse