I'm still yet to see anyone, anywhere, so-called TERF or bigot, left or right wing, male or female or whatever, refuse or deny trans women's right to exist.
Even on twitter, where all the weirdos hang out. Even on 4chan (shudder) where I've only been once and don't intend going again.
I know we have quite a few trans people and trans allies on here now.
Can any of you show me proof that ANYONE has this attitude?
I've spoken to some of my trans friends. They face some ridicule (mostly from men), some hostility (mostly from men) and occasionally threats of violence (mostly from men). But other than issues faced by anyone who is a bit "different" there doesn't seem to be a concerted plan to wipe them out. No-one has told them to die in a fire, although a couple of them have been called truscum. Not by women.
Where are these TERFS who want to erase trans women? Stating that they are biologically male isn't denying them existence, they are still here, still trans women.
I've not seen anyone on here say that trans women shouldn't exist, just that their issues are not women's issues cos they are not women. I've seen some deliberate misgendering and dead-naming sure, but that doesn't equate to wanting anyone erased. Baiting? Maybe. Bullying? Possibly. But technically not even a lie. 
I don't get why all the issues that trans face (mostly from men) are being laid at womens' door. Have I not turned over enough rocks or something? Probably naive, and genuinely puzzled.