This is Rizwan Farook. His co-workers at the Department of Public Health described him as being a really nice guy. He liked to work on cars and regularly played basketball with his friends. When reporters interviewed his neighbor they said he was a great guy and had helped them mow their lawn just one week earlier.
Seemingly out of the blue, Farook and his wife went on a shooting rampage in San Bernardino. Fourteen people were killed and another twenty-two were wounded.
What wasn't known until later was that two years earlier Farook, a life long Muslim who went to Mosque every week, decided he wanted to get serious about learning the Quran. So he memorized it. The whole thing. And somewhere along the way in his studies he became radicalized.
This wasn't a mental illness. This wasn't a man who was mad about US foreign politics. This wasn't someone who lost a child and was seeking revenge. This was a man who sincerely believed that committing jihad was the best way for him and his wife to get into paradise.
And his story is NOT unique among jihadists. The men who flew the planes into the World Trade Center were doctors and engineers from good families. Nidal Hasan, the Fort Hood shooter, had a degree in biochemistry and went on to get his M.D. before turning to terrorism. Muhammad Youssef Abdulazeez was an electrical engineer who killed four US marines and a Navy sailor in the Chattanooga shootings. Etc. Etc.
Jihadist are often people who are well integrated in their communities with no prior mental health issues. They aren't crazy killers who happened to be Muslim. Rather, their middle and upper middle class american's who became radicalized by a dangerous ideology and carried out terrorism in the name of their religion.