There are a lot of them who are genuine leftists, AfterEllen for example is still a genuine feminist left wing site, it's just a site that also happens to hate trans people.
There is a huge risk at just acting like all the trans hate is a product of the right wing...
How are they on the bisexual women front ?
TERFs are basically 3 big pillars of hating on sex workers, bisexuals and trans women.