You are reading a tafsir for the group of verses 23:90 to 23:92
بل اتيناهم بالحق وانهم لكاذبون ٩٠ ما اتخذ الله من ولد وما كان معه من الاه اذا لذهب كل الاه بما خلق ولعلا بعضهم على بعض سبحان الله عما يصفون ٩١ عالم الغيب والشهادة فتعالى عما يشركون ٩٢
بَلْ أَتَيْنَـٰهُم بِٱلْحَقِّ وَإِنَّهُمْ لَكَـٰذِبُونَ ٩٠ مَا ٱتَّخَذَ ٱللَّهُ مِن وَلَدٍۢ وَمَا كَانَ مَعَهُۥ مِنْ إِلَـٰهٍ ۚ إِذًۭا لَّذَهَبَ كُلُّ إِلَـٰهٍۭ بِمَا خَلَقَ وَلَعَلَا بَعْضُهُمْ عَلَىٰ بَعْضٍۢ ۚ سُبْحَـٰنَ ٱللَّهِ عَمَّا يَصِفُونَ ٩١ عَـٰلِمِ ٱلْغَيْبِ وَٱلشَّهَـٰدَةِ فَتَعَـٰلَىٰ عَمَّا يُشْرِكُونَ ٩٢
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3

The nature of power is such that it does not tolerate division. If there are multiple power centres, each strives unceasingly to overpower the others. Now take a look at the universe. The stellar bodies follow their regime strictly and harmoniously. Had there been a separate god for every entity, each one would have distanced himself from the others along with his own part and no harmony would have existed among the different parts. Due to conflict among the various gods, the entire system of the universe would have been disturbed. Given the above, it is clear that the theory of the unity of Godhead is the Truth while the theory of polytheism stands discarded.