There have been many studies refuting that. If anything it's the opposite : the poorer/uneducated someone is the less likely they are to become a terrorist, as there are far more poor than rich.
"Not in poverty" is not the same as a professional (engineer, dr, etc)!
There's been plenty of reporting about the propensity towards terrorism in engineers specifically. Did you have a specific question, or do you just refuse to do your own research?