Supporting genocide is right-wing, "reaching across the isle" to republicans is right wing. Failing to defend people from republican policy is right wing. Listening to corporate needs before the general public is right-wing. Failing to enact leftist policy is right-wing. Sacrificing millions of people to a disease because you're scared people will like welfare is right-wing. Hating communist countries and sanctioning them is right-wing. Filling your party with landlords is right-wing. Being buddies with war criminals like Bush JR just because he doesn't like Trump is right-wing. And defending literal Nazis? Yeah, I shouldn't have to tell you that's right-wing.
If you support the Democrats you are not a leftist, you are not progressive, you are Trump with a blue coat of paint.
Ah but then you get to pull the numbers card. "Actually it's the democrats who are so right wing they think even centrists are on the left. Most of the world is to the left of them." And then they either have to accept that or start arguing that most of the people in the world don't matter, which happens but it's easy to pretend to be shocked and appalled when it does*
*pretend to be shocked, that is. I'm always appalled but I'm rarely shocked.