Earlier quoted context omitted.
Leftist beliefs aren't "half the population is my lesser ". Seriously, would you make excuses like this for a pro-ISIS muslim? A white nationalist? A violent anarchist? An antisemitic holocaust denier? Believing that one person is less human than the other by the attributes of their birth is not a philosophical discussion like capitalism vs communism. If witches are actually doing damage , then by all means hunt them…
That's the funny thing - leftist beliefs are in fact "half the population is my lesser ". The half that are not leftist are "bad hateful people", and you hate them and do not tolerate them. I'm no republican, but I end up being more annoyed by liberals for such blatant doublethink, for being unable to recognize their own actions.
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.