وَٱلَّذِينَ كَفَرُواْ بَعۡضُهُمۡ أَوۡلِيَآءُ بَعۡضٍۚ إِلَّا تَفۡعَلُوهُ تَكُن فِتۡنَةٞ فِي ٱلۡأَرۡضِ وَفَسَادٞ كَبِيرٞ
As for the faithless, they are heirs of one another. Unless you do the same, there will be strife in the land and great corruption.
Agha Ali Puya Commentary
Commentary on Quran 8:73
[Pooya/Ali Commentary 8:73] Aqa Mahdi Puya says: The brotherhood formed between the mahajirs and ansars for the purpose mentioned in the preceding verse, was also used to encounter the brotherhood of the infidels, who supported each other like brothers, therefore those Muslims who stayed in Makka needed help from the mahajirs and ansars to face the persecution of the infidels, which was to be extended to them if they had not entered into any agreement with the infidels, because if the believers had not taken into consideration the sorry plight of those believers who did not migrate, there would have been trouble and sedition.