If militant Islam is as strong as you say, Israel would be gone overnight. Israel has a population of approximately 6 million people. If all Muslims in the area believed in this crap and were willing to blow themselves up to make a point, Israel would be history. The fact that Israel still exists proves this is not true.
The reason Israel is on the map is because they are not successful in destroying it, and Israel has an edge over them in preventing their attacks, not because they do not constanty seek to murder all Israelis. Militant Islam surrounds Israel and you can be sure that if Israel ever fell, God forbid, the US would soon experience all the stuff that is targeting Israel. "First the Saturday people, then the Sunday people."
Also, the spread of militant Islam is not just about blowing up people. Its about converting people to their cause and establishing bases in countries. The US has its own militant Islamic base as well, within its society.