There’s a clear campaign against the mentally ill with the global rise of fascism. Lots of it shows up in anti homeless rhetoric, but you can see it in the MAHA and anti vaccination movements.
There’s no reason to use the word “r-tarded” to describe someone. As someone who’s worked with the intellectually challenged, it’s an insult to them to compare them with people who are willfully ignorant.
I don’t particularly care one way or the other, but I know it really bothers some people, so I avoid using it. Best case scenario, I avoid making fun of a disability, worst case scenario, I had to go to all the trouble and effort of thinking of and using a synonym, such a terrible effort.