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.
This post was probably the first time I used the word “removed” as a swear word in a long while. As I mentioned somewhere else around here, in my language it’s an actual word that means delayed, and I do prefer other swear words for the exact same reason I avoid using swear words that are rooted in sexual moralism - like judging someone for sexual behavior, even though I might not actually be doing that or even considering that person’s sexual behavior when using that word. However, if you want to use a word to describe someone as being “not-intelligent”, it is very hard to disassociate it from a group of people who actually have a clinical condition causing that, ESPECIALLY when people forcefully make that association.
The main argument here against that word seems to be that you can’t say “removed” because mentally impaired people are removed. If we were to agree that mentally impaired ≠ removed, as has already been done for all the previous words associated with them, then “removed” is not a word used to degrade them. It only becomes one if people like OP keep insisting they are removed - which is quite ironic, and we just keep repeating the euphemism treadmill cycle.