who will be the first Democrat to call Republicans the R-word? Setting aside the question of whether they should use a term widely considered an ableist slur
No this section very definitely is talking about using the ableist slur. The r-word for sexual assaulters is not censored in the article since it is not considered a slur.
The confusion is definitely the shitty journalist's fault, because the article is about AOC calling him out for his sexual assault but the journalist opened with a random tweet about democrats calling republicans the r-word, a thing that exists entirely in the imagination of the tweeter