pilot killing everyone

150 innocent lives lost recently. Only explanation I can think of is that the copilot just got a bad diagnosis from the hospital and wanted to go out with a bang. I see so many people come and go throu Gu have these jet bridges at lag ya never think they are going to their grave at all. And most likely you won't.  I've done countless clean no bulls hit flights with actual sane pilots so one bad apple does by no means spoil the whole bunch..