Earlier quoted context omitted.
Simple. They are jealous they are on the sidelines.
In the same way nerds got beat up because the jocks are just jealous of their brains? There can be criticisms of a plan to send a few people to die in a metal box millions of miles away at incredible cost that do not require jealousy as a motivator.
My lack of skills necessary as a programmer to help, and my health issues mean that I can't really do anything but cheer from the sidelines. There will be mistakes, but sometimes you have to jump into the river with both feet if you wish to cross.