"primary concern is for the families of those that just lost friends and family members."  

And the US Supreme Court turned down that argument for that nasty 'church' in the Midwest that goes to military funerals and tries to incite violence.  Westboro Baptist 'Church'.  Snyder v. Phelps (2010)

https://www.supremecourt.gov/opinions/10pdf/09-751.pdf

"Or, he might be justifiably concerned with violence, another Christian could be attracted, or maybe an anarchist looking for revenge."  

That one was turned down way back in 1949.   

Terminiello v. Chicago (1949) "A raging antisemite and right-wing lunatic, he gave a speech in Chicago that prompted protestors outdoors to riot. The city of Chicago arrested him under a law banning riotous speech, but the Supreme Court overturned his conviction."  Justice Douglas wrote that opinion.  



What else have  you got?  

That will isn't  Unconstitutional and hasn't  been for over 65 years.