These crazy people with access to guns should just kill themselves before they go ahead and kill others first. Don''t know what they gain from doing these things because the innocent people on the train are not the ones responsible for the problems faced by the attacker.
It's interesting that the college attended by Alek Skarlatos, one of the Americans who tackled and took down the terrorist on this train back in August, was attacked last week. Another of the three Americans was attacked earlier today, and stabbed several times. The news report I saw stated that this attack was unrelated to terrorism, but if not, it seems a strange coincidence.