I've never been one to come and back up Slim, but even I have to point out everything wrong with that "what if" statement.
The Muslim and Jewish inmates are still allowed to pray. Hell, it's nearly impossible to stop them. As long as a Muslim can find East, he can pray in his cell, if need be. That comparison was just... off.
Also, the vegan and vegetarian meals are still available at the prison. Catholics wouldn't be forced to eat meat on Fridays. Hell, as is stands now, Muslims and Jews can choose those meals. Nobody is being forced to eat pork or violate kosher/halal traditions. They have options.