Several Phil Phollowers have speculated that deep down inside Phil really isn't the radical leftard that he wants people to think he is. He loves guns, has a military and cop fetish, can be pretty racist at times, has some pretty strong fascist/authoritarian views...basically he just wants everything for free without having to work. That's what Phil thinks Socialism/Communism is, so that's what he identifies as. And lefty groups tend to be far more accepting than conservative groups, but Phil easily wears out that acceptance.
He can troon all he likes but he's still obviously just a fucking white male. Usually they'd let that slide because calling into question the validity of a troon's bullshit is too dangerous for other troons to do, since it just reminds people how bullshit all this troonery is for all of them, but Phil, like Jonathan Yaniv, is so blatant and embarrassing about it that they all know what a joke he is and that it reflects on them.
They can't outright disown him, but they aren't going to put him up in their own troon caves.