Is criticism of the use of that word against 196's rules? Here are articles from the Chicago Tribune and the Anchorage Press, and a definition from the Cambridge English Dictionary which say:

Taking the R-word and adding "lib" to it doesn't make it any less offensive. And what bothers me is that those who combine "liberal" with that word are not insulting their intended targets — they're insulting an entire group of people who have done nothing wrong, all while perpetuating a term that simply needs to go away.

Combining the R-word with liberal makes it no less offensive.

an offensive word used by some people on the extreme right of politics to refer to someone who holds left-wing political beliefs

While I understand that you're using it ironically, I believe that being critical of the ironic use of offensive language is valid and contributes to discussion. I find it concerning that Nakoichi's post was removed without any explanation other than calling him, "braindead."

Being called a liberal is insulting enough. Most liberals will identify as progressives.