LOL there is no such thing as it could never happen here.
What I am saying is at this moment in time they have neither the assets, the resources the experience soldiers.
It takes more than a willingness to die, you need trained fighters, you need support staff, you need a strong logistics base, you need safe houses, the list is endless. And with the Muslim population around 2.8% of the total population they don't have a Strong enough support base even if nearly all the Muslims wanted to wage such a war.
And as I said what is left of the extremists networks are being very closely monitored.
Do that in the US and you'll be accused of racial profiling.