The Gambetta paper, which Gawker doesn't link because Gawker so I will, actually found more than their title claimed; engineers were heavily represented among right-wing terrorists, but not especially common among left-wing terrorists. Their conclusion was that the Right drew people with a need for cognitive closure, as does engineering. If that is true than studying engineering isn't influencing people to become terrorists, people who might be inclined to become terrorists are also inclined to study engineering because they both fulfill the same need.
Speaking from anecdotal experience, that is exactly what I've seen. I was once training an engg student at work how to set ski bindings. We were looking at DIN settings, and he could not handle the fact that the numbers had commas instead of decimals and no units on the chart. He just slammed into a wall and shut down, even though all he had to do was match the number on the chart with the number on the bindings. He quit a few days after that, before officially starting his shifts. From what little sample I've seen, science students (especially physics and engineering) generally see things as very black and white. It either is, or isn't. People are either good, or bad. There is very little empathy for those who committed wrong. Many of them hated sociology and ethics courses, because "there's too much ambiguity."
I have a CS degree, and did most of a math PhD. I don't think I've ever known anyone who completely fit our stereotypes but, of course, stereotypes exist for a reason. I hated nearly all of my humanities requirements, but mostly because they were requirements.