brother, I don't quite understand your question about 'Muslims' who doubt the actions of our Prophet . If you quote garet122 as the 'Muslim' that you highlighted, only Allah and garet122 himself know if he's a Muslim or not. And garet122 did make a statement before like mentioning that there's scientific error in Quran regarding the talking ants of which a few of our brothers here refuted his statement. Nevertheless the question needed to be addressed with some references to the event to answer it completely.