Why not? The cartoons basically ask why Muslims have tolerated terrorists. It is a serious question, and the right people could hold a serious discussion around the dinner table.
Good manners are required in a workable, civil society.
No, good manners are DESIRED - but not required, for a workable, civil society. It just requires the emotional maturity to save taking offense for matters that require it.
There was nothing wrong with the cartoon showing an arab face with a bomb in the turban. Anyone who considers that justification for killing is not stable enough to be allowed to roam free in a workable, civil society.
Oh, Mr. Rogers, why did you retire? You need to go back to the neighborhood and teach about the maturity, both emotional and intellectual, that is so needed and so sorely lacking in their beliefs.