Purpose of righteous struggle

لِيَقْطَعَ طَرَفًا مِّنَ ٱلَّذِينَ كَفَرُوٓا۟ أَوْ يَكْبِتَهُمْ فَيَنقَلِبُوا۟ خَآئِبِينَ

That He might cut down a section of the disbelievers or suppress them so that they turn back disappointed.