You think so? Hell, a significant number are already declaring Democrats and the left "enemies of the people." We see illegal actions taken by police against protestors and activists every damn day of the week. Why on earth would you expect the military to be any more high minded than the police? No, a substantial number don't believe non-white, non-christians are really "American" in which case they wouldn't even see it as unconstitutional to remove their political and civil rights. Once they've decided the political opposition and they people the opposition represents aren't "American, you think they'll balk at suppressing those "enemies of the people"? Add in that most of the rest will simply go along rather than face consequences and I think the odds of rank and file understanding or caring enough to disobey orders are slim. Few and far between are those who will disobey orders. I think you have by far too romanticized a view of the military.