Sorry NIlDrift but ultimately your your point of view is immoral.
If I’ve been trained to kill or fly AT, is it ok now if I go and kill or fly AT in anyones army, for any purpose at all, and say I’m just doing my job?
Everyone who has a skill set, eg soldiers, sailors and aircmen, must decide if what they are doing serves the moral good and, if not, be prepared to walk away, resign or not join up. What makes a war just? Conquest (eg Russians in Ukraine in 2022), or liberation (Allies in Normandy in 1944)?
So should we support a crew serving in Putin’s unjust and immoral ‘special operation’? Of course not, not in any capacity!