best explanation I've heard is that second wave feminism had actual political success in the UK so it entered the establishment. now second wave feminists are reactionary and the people who took power as part of that movement haven't really moved forward from that position. whereas, in the US, second wave feminism flopped and so we didn't have the same entrenchment.
I mean, they do like women, but only a certain kind of women
This is the best explanation I've got. Second Wave British feminism was all middle class white women who wanted to have a career while their minority nanny cared for their kids. It was never intersectional or grounded in the struggles of oppressed people, so it just solidified in to this turgid middle class brick lodged in the middle of British politics, and it sucks.
Because UK is civilised enough that Transphobes have to hide behind feminism.
Unlike in the US where people can be openly transphobic in the classic religious sense.
Like all British people, they are sex pests, and thus assume that all trans people want to fuck them.