Not needlessly.  Some risk is required for a free society.  If the cost to have absolutely no lives lost to violent fanatics is state control of religion, it is too high a cost.
		
		
	 
Another thick one.
Operating automobiles is a required risk. Drunks and madmen can and do operate them but most people are not drunks nor madmen.
Gun manufacturing and sales is a required risk (in the U.S. anyway). Most gun owners are responsible, law-abiding citizens who want self-defense or sport and will never draw on anyone who isn't trying to commit immediate bodily harm.
The legal sale of alcoholic beverages is a required risk. Alcoholism is the result of personal choice; everyone else should not be punished for the foolish choices of a relative few. 
BUT THE MASS IMPORTING OF SHARIA-SYMPATHETIC MOHAMMEDANS (ALL OF THEM) AND JIHADISTS (TOO MANY OF THEM) -- NONE OF WHOM WANT TO ASSIMILATE -- IS NOT A REQUIRED RISK. IT IS INSANE. 
There is no logical reason to import people into a country who (a) consider themselves the superiors to ALL non-Muslims and so (b) do not wish to assimilate but rather (c) if given the choice would gladly replace ANY existing non-Mohammedan government with a sharia-based Mohammedan one. 
Are there individual Muslims who are exceptions to that? Yes, I expect that there are. I always have.
Problem is, the ones who want to conquer 
LIE about that so there's no way to know who is who until it's too late.