Because I’m am open-minded person many of my white liberal friends express to me their true views of Islam. Progressives do a lot of ‘solidarity’ with Muslims, but privately many think Islam is a regressive religion. Which, on the whole, is true.
But this is a general phenomenon. People will tell me things they might not tell others because I don’t judge (unless they are stupid). A friend who is a big player in Democratic and progressive politics has been trying to get a sense of why India has caste, and other regions do not. I can’t give him a good explanation.
Ultimately though, he concludes from the existence of caste that Hinduism is a messed up religion