That's a definite concern.
I think the one thing that can make the productive and thrifty fare better than the Kulaks is, in the US the class lines aren't as firm as they were in old Russia. In old Europe, the military were a certain class, the police, the politicians, the farmers, the merchants .... you didn't have a kid growing up on a farm then joining the military then becoming a cop then later going back to the farm .... there was almost no social mobility. In the US, if they tell the troops to fire on or round up say, farmers, or small shopkeepers, they're going to have a problem because a good number of those troops come from the same kind of people.
And we're well-armed. Now this is going to bring a storm of comments about how a gun can't take on a tank or a helicopter gunship. First, a gun can, with accurate shooting! Second, look at how a bunch of barefoot Middle-Eastern hillbillies are making fools of us Over There.
Lastly, the more we can get people interested in gardening and keeping chickens and being frugal and forward-thinking, the less we're some odd "fringe" group and the more of the general populace are on our side, because they've become us - farming, gardening, livestock-raising, future-preparing, salt-of-the-earth type people.