I use that one all the time. They also hit scientology on the head. Scientologists love when you talk about xeno and that black people were the bad spirit babies and their melanin count is a result of their bad behaviour. If you really want to call something racist, look at scientology, that shit is racist as fuck.
Funny that it's conservatives that use it as a cudgel when they are warriors for for their own social justice. LOL.
"Oh yeah? Well you're fighting for 'social justice' ha ha ha!"... saying SJW in any way that actually utilizes the definition of the words involved makes the insult sound like something fucking Snidely Whiplash would say.