Are you sure you want to delete this post?
Most all of these terrorists are young, in their 20s. Many of them are "home grown" although, perhaps of Middle Eastern descent. The question that needs to be asked -- what is it that drives them to such heinous suicidal acts? Are they marginalized socially and economically (stigmatized) in their own country of birth? Is the stigmatization due to their religious beliefs, or is it more racial and ethnic? Or something else?
Or are they just victims or prey to unscrupulous leaders and their extremist propaganda?
If you remove the racial/ethnic/religious factors are some of them just emotionally disturbed for whatever reasons...family perhaps? Most of the mass shootings in the USA are more motivated by family and work problems than political or religious hatred.
Yes, they are the disgruntled, feeling left behind, wanting to make a name for themselves, and buy into anyone or anything that may offer them fame, fortune comes in the form of 39 virgins when they reach their final destinations.
The disgruntled Florida awning factory worker killed with a gun (probably legally acquired) because he'd been dissed by coworkers back in April, he returned and opened fire on his former coworkers.
I always tell my spouse and myself when we get behind the wheel to drive responsibly and not to agitate or aggravate another driver on the streets or highways, if you do, you just might be killed.