I've never felt the need to draw a crude cartoon of the Prophet Mohammed myself, and I doubt many others have either. It's not an inalienable right is it?
As far as i know the US constitution doesn't say 'every American citizen will have the right to bare arms, plus the right do draw little cartoons of the Prophet Mohammed fucking a sheep as a wind-up'.
If someone shot at me every time one of my doodles came out, I'd probably just stop doodling. I shouldn't have to, but it's no real effort, unless you're a professional cartoonist working within the narrow 'drawings of deities' market. Generally I try not to incite crazy nutters with firearms, foreign backing and terrorist tendencies.
As an aside - Given that it seems the NSA spies on every person & every single electronic device in America isn't this on them somewhat anyway? Not the actual attack itself but stopping it before it happens, which I thought was the point of all that nonsense. Considering the amount of draconian, undemocratic laws they've brought in in the name of terrorism, they should be able to do a better job of protecting their citizens' rights to childishly offend entire religions.