Am I right in thinking that many feminists do not have issues with men who have undergone a full sex change and live as women?
I don't have a problem with any individual living how they want to.
Personally my issue with some transactivisits and a lot of the trans narrative is the idea of 'living like a woman'. What is 'living like a woman'? We're all different, we all have different tastes, preferences, hobbies, talents etc. Some women like to wear heels, some prefer jeans.
If you look at what MTT people say, they often refer to stereotypes. 'I knew I was trans because I wanted to wear dresses/play with dolls/wear make up'. It's a story that goes 'I was born an x, but I want to do y things, so I must really be a y.' And with that ' if you're not trans, then you must be happy to do the things associated with your sex.' Like many women, I'm not particularly happy being treated as a woman. I'd quite like equal pay, no sexism and better conviction rates for crimes against women.
The trans narrative seems to me to perpetuate sexist stereotypes. I'd much rather say 'You're male because of your genetic makeup and sexual organs, and actually you'll never be able to really, truly change that. (Not in our lifetime anyway). But you can still wear what you want, do what you want, be interested in whatever you want.'
I think we (everyone) should be fighting to make it acceptable for men to wear makeup and dresses if they want. We shouldn't be pretending that someone born xy is the same as someone born xx.