I suspect you are a muslim and are pissed about the joke because it is about muslims and their intolerant attitude towards all other religions, which of course is all right. I strongly suspect you wouldn't have made a comment if the sign had turned out to be on a muslim establishment of some sort.
What would you know about Christianity?
Have you ever read the Bible?
God says more than once that He takes no pleasure in the death of the wicked.
It gives Him no pleasure to send people to Hell, and for you to suggest that us laughing at the death of lost souls "Christian" humor is just unreal.
I don't think God enjoys seeing us laugh at the suffering and misfortune of others.
And I make no apologies.