US Constitution seems to protect it if a case can be made that calls to murder are a part of the Muslim religion. I'll let the Muslims decide what is and what isn't a part of Islam.
Calls for sexual morals, -- the subject of this thread, -- are surely a part of Christianity.
Historically, calls for just war have been made by Christians. Pope Urban II and his call for the Crusade comes to mind.
I think that generally a concurrent use of the public square by incompatible religions is a problem, and the US Constitution should have made a distinction between Christianity as a dominant religion and minority religions. Of course, mass immigration from culturally incompatible lands was not foreseen by the founding fathers.
Correction-- US Constitution as interpreted by the corrupt and Ignorant would seem to protect Muslims if
their claims could be proven a part of their religion.
Problem is there is ample evidence that supports the idea
that the founders interpreted "religion" as defined by
Webster in his An American Dictionary of the English Language ,1828 to mean ,primarily,Christian religion.