Holiday attacks

On Tuesday evening, Strassburg's Christmas market was hit by a radicalized local armed with both a gun and a knife. He did his worst before being 'neutralized' (ausgeschaltet in the German language press) by the police on Thursday evening. I've spent many-an hour in Strassburg particularly around this time of year. Attacks like these are heinous, but attacks in places I know fairly well feel more personal somehow. Radicalization, the idea of it, trips me out. Sadly, I can easily imagine an unhinged person taking up arms against Christmas visitors to downtown SF. In fact, it almost happened a couple of years ago. Truck driver and former US marine from the California Central Valley, Everitt Jameson, had made plans to kill people visiting Pier 39, a popular SF tourist spot, on Christmas day in 2016. He'd unwittingly been communicating with an undercover FBI informant which, fortunately, led to his being arrested before any damage was done. Jameson was brought up on charges this past autumn and sentenced to 15 years. 

I wonder if there are any sort of de-programming schemes set up in prison to deal with radicalized Americans? 

Jameson, self-professed ISIS supporter (left), and Jameson in his dress blues (right).