If they say “we will kill you if you blaspheme the prophet” and we say “it is stupid to blaspheme the prophet” who won the free speech argument?
You can't "blaspheme the prophet" he's not a god, he's just a dead guy, and not a very nice one at that.
In fact, I'd venture to guess that if anybody, the maniacal murdering moslems are actually "blaspheming" their Allah, by elevating the cutthroat child-molesting dirtbag to a god-like status.