I have no expectation behind wolf’s actual mental impairment the same way the N word would expect it, since it exclusively only targets black people. So no, I shouldn’t use it, but using it doesn’t justify any other slur the way you imply, either lighter or worse.
And with that said, I’ll use it anyways. Because, fuck it, I despise people like that, double down time. Someone should take anyone who makes antivaxxer media or argues antivaxxer rethoric and institutionalize them IN THE MORGUE.