If I were a Muslim, I would certainly be offended if someone said my religion treated women badly ... it's pretty clear that Muslims say Islam is a religion about love and respect etc etc so calling their faith names would count the same as calling them names....
Now the question if Islam is actually treating women like shit or not is whole other debate on its own, considering that what is taboo and 'not on' for Westerns is the reverse for others and vice-versa.
what is considered 'ok' and ethical for each person is a product of the stimuli and experiences and things he/she has learned based on where they grow up and the culture of said place.
For example, burping is considering rude in Western countries while it's considered a compliment in some Arab countries ( correct me if i'm wrong of course, but that's what I've heard).... same applies for almost everything even though treatment of women or other religions is a way more delicate subject than burping