The red flag is calling people SJWs, not necessarily being one. Most of the time it’s just random progressives who gets labeled as such. So using the word as a pejorative makes it sound like you absorbed the term straight from the alt-right. Which is a red flag.
Nothing wrong with disliking performative people, but again, SJW isn’t even the best word to call them.
Using SJW unironically is a red flag
And so is “extreme right-winger”? What about Mormon missionary?
The red flag is calling people SJWs, not necessarily being one. Most of the time it’s just random progressives who gets labeled as such. So using the word as a pejorative makes it sound like you absorbed the term straight from the alt-right. Which is a red flag.
Nothing wrong with disliking performative people, but again, SJW isn’t even the best word to call them.