As an athiest I cannot understand religion in any way shape or form.
However as a none religious person the main religion dicsussed openly in the world in a general negative is the Muslim religion as the back lash behind the extremists affects the whole world.
Look at other religions, they have silly things they do, but the things they do are less dangerous etc....
Jehovahs Witnesses; knocking your door to chat about god etc, and no birthday celebrations. Annoying but not dangerous etc etc.
Muslims; some of them threatening to bomb places and commit genocide. Causing death and pain for masses of people.
I just see the extremists using the Muslim face as an excuse to attack Western Society. It in my opinion stems from jealousy.