Conservatives are liberals, too. I read the top comment in this thread as distinguishing between the far right (fascist or fascist-adjacent, some of whom pose as or are conservatives) and liberals (conservatives, ‘progressives’, radlibs, and all the radical tendencies that talk about revolution but whose actions reveal them as liberals).

So in the US, that both parties appear to be conservative is because they’re both liberal parties. (For now. They both have cryptos and far right members who will be leading the charge to fascism when it comes to it if we’re not already there.)