It was the same for me, NellWilsonsWhiteHair. In 2017, I was not questioning TWAW (I wasn't repeating it either, I simply didn't think about it). I heard talk of these vulnerable, marginalised people being bullied dreadfully, heard about this one poor youngster who wanted to be a women's officer for the Labour party, remember reading a Guardian article about how awful it all was. Didn't stop to think.
And then I heard about an assault on a woman at Speakers Corner in October 2017. I followed a lot of left Twitter accounts, organisations and individuals, who collectively agreed that she deserved it for her opinions.
That was the moment I took notice. What terrible, horrific things must that woman believe to deserve violence for mere thoughts? What monstrous ideas?
I looked, and I found Maria MacLachlan and a belief that women have rights and the right to stand up for them.
(And yes, what I believed then, what was good allyship then, would get me labelled transphobic today. But that's not what helped me see what was going on - although the goalshifting does show the totalitarian nature of the ideology and its proponents. It's increasingly obvious that only full submission will do.)