Ping!
I confess that I haven't had a conversation with a Muslim for years. Decades, I imagine. And, where I live, there are none to be seen.
Still, I have made the presumption that the vast majority of American Muslims, at least, are appalled by events like 9/11 and 7/7. As I think about it, though, I am not aware of any news stories reporting Muslim leaders denouncing the actions of terrorist and terrorist acts such as these.
It could be that the MSM chooses not to broadcast these denunciations. Or it could be, I suppose, that they have not been forthcoming.
In any event, experiences such as your father's cause me to wonder...
Now that you understand, do everything you can to help others open their eyes to this truth, please!