I’ve noticed this too, since I have a number of engineers in my family. Perhaps this study should differentiate between American Engineers (a pretty stable group) and Middle Eastern Engineers.
My youngest son who has a PhD in Engineering was the only Caucasian American male in his class — in contrast to his older brother’s class (mostly American males with only one female) or his father’s class — 100% male American with a handful of foreign students. My youngest son, who worked his way through college as a lab assistent in several locations, found that much of his time was spent repairing equipment carelesslyl damaged by the Middle Eastern students who came from wealthy families and were used to having everything done for them by servants in their homelands. In fact, my kid was so nice to his colleagues that his advisor had to order him to STOP helping these other guys who were constantly messing up their experiments and destroying lab equipment.
Perhaps the key is in famly background — not country of origin.
Hey!
Who’re you calling stable, pal?
Have you READ some of my posts?
;-)
Or maybe, adding religion, a toxic mix of all 3: Family/Status, Country of Origin/Culture, and Religion.
Although, Arab culture was not particularly violent prior to Muhammad.