Would you agree that we are on the threshold of a 100 year war with radical Islam?

I'm not ready to agree with this. Yes, there is a great potential that the conflict with radical Islamists could be protracted. On the other hand, maybe not. The Islamic world, mostly centered in the Middle East, has enjoyed long periods of relative stability. I don't see why that couldn't happen again. The key is "submission". Islam teaches its adherents that submission is the key to salvation. However, people do not easily submit to weakness. Just as wolves would never submit to any but the strongest in the pack, Islamists will never submit to other cultures that roll over and expose their most vulnerable parts when they approach.

Thus, I believe that the terrorism will decline just as quickly as it rose when it is confronted with strength, when we have a Commander-in-Chief who will let slip the leashes on the dogs of war. No, I don't think they need to be loosed completely. Just enough so the terrorists can see their bared fangs should be sufficient.
http://www.bizpacreview.com/2016/01/17/why-america-needs-to-get-ready-for-a-100-year-war-with-radical-islam-295377