Accusations have to be proved before being spread around as baseless rumours.
Nouman Ali Khan said in one video that women who have had their husbands killed in battle could either live/die in the desert alone, or become a concubine!
he gave them no third choice of being looked after decently until they either became citosens of the state or escorted to a place of safety:
9:6 If anyone of the idolaters seeks your protection or a safe passage, grant him state protection. Convey to him the Word of God, and then escort him to his destiny where he feels safe and secure. This kindness on your part is mandatory since they are a people unaware (of the beauty of Islam).