Racism is denounced on the right.
I am unaware of any prominent Republicans who are opposed to interracial marriage, or who think that Larry Elder's race disqualifies him from being Governor of California. (There was the argument about some idiots in Texas being upset about a black man principal sharing a photo of his white wife, but these people are not prominent Republicans,
and they claim to be upset by tattoos.)
The article isn't really about liberals vs conservatives.
At earlier periods, there tended to be liberals and conservatives in both political parties. We've recently had more ideological sorting, although forced sterilization became legal in the United States around the time of prominent left-wing Democrats like William Jennings Bryan and Woodrow Wilson starting changing the perception of the party.
There's a lot of confusion about the story, which is a bit more complicated than the memes.
Ivermectim is used against parasites in the third world, and approved for that purpose in the United States.
The rumors that it was successful (not a lot of evidence on that) against Covid led to a shortage, which led to people taking the horse version. But the headlines lead others to think that the only legitimate form of the medicine is the one for horses, which also leads to a skewed understanding of it all.