For pete's sake! Stop cringeing. This is a state of extreme concern and if someone is suspected and he won't stop when challenged then the ultimate occurs. That is NOW the ROE according to the police - shoot to kill. What the hell is wrong with that?
Would you prefer that they didn't get to him/them and he/they detonate on the bloody train! Get real. This a REAL situation. If these people want to live by the sword then they die by it. I am happy with that!