I'm a Theravada Buddhist and by definition a person who consider Islam to be a sick joke. But I do not approve any of these actions. I'm a believer in the Non Aggression Principle. You don't shoot first. Period. If these people were affiliated with ISIS or other Muslim extremist group that's a different case. But attacking people based on the some religion that's forced upon themselves is absolutely unethical.

Ends doesn't justify means; principles does.