This also has me thinking of the guy that wrote the "ban the NRA and go block by block shooting everyone who resists" editorial.
Despite being wrong on just about everything I can think of, the one thing I note about Islamic fundamentalists is that some will "walk the walk" when someone goes out of their way to insult them.
Of course, one needs a strategic analysis of when such things will help more than they hurt. I find myself wondering where that point is.