I think it has been happening, especially stateside.
Remember that video of the terrorists shooting cops in cold blood in Paris last year? A freeper said, “Trump just won the presidency.” That freeper may have been more correct than he realized.
I think that with every event like this in Europe, the US is more prepared, at the very least spiritually and culturally, to do what is necessary. The ONLY thing I really worry about is the nuke in a suitcase.