Much as I distrust "Progressive" liberals, I've seen no evidence of some latent desire on their part to round up all conservatives and ship us off to concentration camps.
Indeed, when you think about it, if they exterminated all conservatives, who would do the real work, and pay all the taxes?
No, a socialist "progressive" looks on us conservatives the same way a farmer looks at his dairy cattle -- as livestock to be controlled, fed and even pampered, just as much as necessary to produce the maximum "milk" (taxes) possible.
To borrow another metaphor, even the dumbest of liberals understands that you don't kill the goose which lays golden eggs.
As for the long-distance future, who knows?
But I'd say it's a little, ahem, "premature" to begin worrying about cattle cars and gas chambers for America's conservatives.
I have had my local mayor begin a meeting with . “I don't care about you and your problems.................”
Obama is destroying the wealth, not milking it.
Now a republican might think like you propose.