I'm so sick of "defend traditional lesbian spaces from the troon menace!" Nah. Homosexuals destroyed every normal space, fuck your spaces.
Another common radfem talking point is that men should tolerate and include homosexuals and "gender non-conforming" men, and not "oppress" them - they might turn into trannies, even!
So you will always find common ground with the TERFs until it's time for solutions, like "hey, should we maybe do something about this deviancy and social decay", and their answer is never social ostracizing of abnormal behaviors.
In reality, there is a VERY large tolerance of GNC behaviors for men, and very few men are actually monolithically strong, athletic, father of 5, business owning, loving patriarch of the family that never drinks type.
Where there is no tolerance is when other men start to be actually effeminate around normal men, creating unease. A cishetero dude does not want to deal with the uncertainty of "is this sperg actually hitting on me".
When I joined this site, I was very friendly towards the TERFs, posted in their threads, shared some of my knowledge about the medical part of SRS and HRT in those BP topics, and even went so far to say (repeatedly) that men should have an alliance with women against the transgender shit, and we'll see what
after we deal with that.
Needless to say that it's quite obvious now that behavior based on finding a common goal and compromising/burying the hatchet for a while does not work, and I was quite mistaken.