The Confederate statues were errected during the Jim Crow era, and memorializing those men wasn’t their primary purpose. It was to remind those uppity coloreds that they were still living in the white man’s world, and they best not forget that, or their place in it.
I can’t speak to the specifics of the monuments taken down in El Salvador, and whether their destruction more closely mirrors Nazi book burnings, or the destruction of Jim Crow Confederate statues.
My point, sarcastic as it was, was that the tearing down of monuments should be judged on their own individual merits, because there isn’t one right answer.