I don't know why left wing groups would celebrate. Other than the conservative category, most of the descriptors he used were inborn traits like being straight, being white, being a man, or immutable attributes like being from a particular country. (And honestly, being conservative may be one of those traits too, but it's less obviously true).

I know it's common to look at the most unhinged people on Twitter and say all leftists are like that, but I really do think most left leaning people would say that it isn't a good outcome for it to be biased in this way.