Which "he", and "went" where? You mean why Kyle crossed a state line, why he went to the riot, or...? Kyle crossed a state line to go to work. He had a job as

Which "he", and "went" where? You mean why Kyle crossed a state line, why he went to the riot, or...? Kyle crossed a state line to go to work. He had a job as a lifeguard at the YMCA. After work, he stopped to help a group of people cleaning graffiti off of the local high school. (there are photos) He then, with his local friends, responded to a business owner who wanted help guarding property. Those friends supplied the rifle. Kyle brought a medical kit and helped bandage a rioter who got an injured foot. At a gas station, rioters set a fire in a wheeled dumpster. It seems they intended to push it toward the police. Kyle is seen in video running with a fire extinguisher. Somebody then used the fire extinguisher to put out the fire, enraging the rioters. So I think it is obvious that Kyle was trying to save people and property. You might find that unbelievable, but some people feel a duty to do that kind of thing. It's notable that he only shot people who were actively attacking him. Former attackers and armed potential attackers were not shot at. It's a surprising amount of restraint.