A comparison to Communists would be sort of like if, instead of taking both violent and non-violent action to foment and enable the revolution of the proletariat state-by-state and across the world, Communist terrorists were looking to cause destruction such that enemy states would collapse with maximum internal damage, with the Select moving in through the rubble under the leadership of Zombie Lenin to absorb fragmented communities and enforce proper Communist rule over humanity.

Another way to put it is that Islamism is the opposite of Communism in terms of parochiality. Islamism is only "international" in the most technical sense of our terminology.