I've never seen any leftist claim that any group is inferior by birth; though it is, of course, easy to find leftists looking down on people for the ideas they

I've never seen any leftist claim that any group is inferior by birth; though it is, of course, easy to find leftists looking down on people for the ideas they hold and politics they practice. But having bad ideas doesn't seem to translate to "is my lesser" or is less human than me. To put it another way, the leftists will acknowledge that anyone can grow out of stupid ideas (and indeed, there are hopeful stories of bigots changing their tune), while the things the right gets down on people for (being gay, whatever) are things built into the person. So, I think this is an inaccurate characterization of the left. You're free to be annoyed by whatever annoys you, of course, but this one might merit rethinking.