As individuals yes, as representatives of the armed forces? Not likely. Anonymity helps, but I'm sure many would be wary of posting anything contrarian views right now.
Depends on what a person posts, but yes I'll give you that. I can't see it being anonymous from the government if they wanted to find out someone's identity.
Yeah, since it's "peace time" and less risk there's probably a decent chunk of the armed forces who are just in it for the perks ( free college, Healthcare) and don't believe in it and are trying to serve there time and get out and not make a career of it.
They aren't cops who almost always want to be cops and make it a core part of their identity and belief system. They aren't allowed on lemmy.