I rather wonder if that one would be allowed It Italy seeing as they banned the Athiest bus slogan
-Ended up with one saying "Athiests exist and the Good news is that they believe in free speech"
I know what you mean though but your analogy is flawed.
There have been many cartoons of Muslim leaders like Ayatollah Khomeni.
Muslims tend to get upset when Muhammed is depicted.
But then People like Christian Voice act up when Jesus is lampooned - Jerry Springer the Opera for example.
It's a matter of numbers most "Chistians" in this country don't believe in God anyway so they don't get too upset