You pretty much have it in my 1st post JohnQ. Maybe just an added comment or two now that you ask.
There will be some level of terrorism as long as islam exists. Wherever islam is taught, there will always be the "lunatic fringe" seeking world domination, and failing this...to maim and kill as many infidels as possible. These will come even from "moderate" islamic families because islam provides a "legitimate appearing" vehicle for the criminally insane to "express" themselves. Until the "civilized" world recognizes this and acts accordingly to defend itself by outlawing and preemptively stamping out islam in all its territories, I think we can expect to see terrorist outrages increase.
Now aren't you glad you asked JohnQ ??