The phenomena itself of the TRE’s trying to wedge in and then hijack everything goes back, at least to commonly available and printed evidence that I could find to 1993.

I remember some of the big orgs “transitioning” to trans primary issues ticking upwards in 2007/8 with youth related things first. It got worse in around 2012/13 which is when I personally peaked. It has definitely increased in how rabid it is since 2015 and become a very “big talking point issue” but some well known feminists were either wimpering to the T or had already been terfed once by 2015- at least those somewhat well known to the millennials.