“We’re best friends. We’re basically the same guy in two different bodies.”
Posey stans shit on Holland because Stydia, and they hate every single thing that gets a bit more of attention, be show/media attention or fan attention, that TPosey. Also because she has mentioned Sterek a couple of times in a non-negative light. A lot of Posey stans also stan for Shelley because she ''broke'' up Sterek, she ''gets along'' with Posey and she is disliked by the Sterek fandom in general. Take all that, and you got a good secondary martyr for themt to stan for.