Have a nice day.
Catholics of the Middle Ages would kill you for not believing as the law prescribed. I reference the Albigensians and Hussites, and a host of other smaller groups and individuals.
Were these Catholics not members of a religion?
Sure there were Catholics at the gates of Vienna (both times). They were just on the inside, not the outside of the gates.
My point is that we can’t say a religion we dislike, or even one that is objectively evil, ceases therefore to be a religion. Religions can be bad, just like any other human production.
Aztecs and most other “civilized” American Indians practiced routine human sacrifice as part of their religions. Does that mean they weren’t really religions?