That so much hate has been aimed at Hubbard as an individual, including accusations of cheating I think speaks volumes about the mindset of those making those accusations.
Still substantially less hatred than that received by JK Rowling just for stating facts.
The problem is this debate has become poisoned, and if you look at it dispassionately the poison has by and large come from a very small, but very vocal subset of the Trans lobby. That there is push back from women and others on this issue is hardly surprising when you realise the stupidity of some of the trans lobby's arguments.
I'll try not to bore you with too many details but I got involved in a discussion elsewhere and was asked (hypothetically speaking) if as a gay man I would sleep with a trans man (that is FTM) if they were pre-operative. I said no I wouldn't. I was then bombarded with all sorts of messages some of which were vile. The least of them in terms of vileness was that I was "transphobic" because I wouldn't sleep with a trans man. A claim I denied, except in the deluded trans world I don't even have the right to deny it because I "haven't walked their path", or some such other hippie-ish hogwash.
What the militant part of the trans lobby are doing is trying to blur the lines on sex and shut down debate. You haven't got a penis - so what, you can be a man if you say you are. You have a cock, hey guess what if you say you are a woman, hey presto, you're a woman. It is, putting it bluntly, bollocks (in this context a bit more than bollocks!)
There are good reasons for maintaining a male/female descriptor relating to their original state for a trans person, even after they have transitioned, not least of which are the medical ones.
The issue of what you call them to their face is a different one and I would have no problem referring to them as they present themselves to me. I appreciate others do and have valid reasons for wishing to use their original pronouns, I'm just not capable of being that direct.