I think what he said is ridiculous. Of course people are going to make jokes about religion and it is not the same as insulting someone's mother or taking the piss out of the elderly/ disabled.
Religion is a choice, we make that choice ourselves and it is just an organisation and a belief, we choose to follow it or not and the point of this is that it is supposed to help you become a better person.
I am buddhist, I absolutely love my religion and it has helped me through some of the most difficult times. Buddhist jokes are rife though, they're everywhere and to be quite honest, I usually see them within buddhist communities as they know how to laugh at themselves, it's fine, it's funny, it's a joke.
If your religion makes you that passionate that you want to kill someone for joking about your choice then you are not becoming a better person through it and it's pretty pointless in my opinion.
Most people within any religion can and do laugh at satire. People don't deserve to die for a joke.
To be honest as well, no one deserves to die for jokes about the disabled either, even though this is horrific and a lot worse. If you kill people then you are bad and not really doing your religion any justice. That goes to all religions, and all wars.