Of course it's not 'only some women'. That is completely twisting things. All women have rights. All men have rights. Those rights, however, do not include the right to impose on the rights of others, and do not include the right to force others to go along with a pretence that people can change sex.
Transmen, like transwomen, have a right to live as they please, and to do so free from let or hindrance. They may believe that they have 'transitioned' to become members of the opposite sex, but that doesn't make it true.
Most people will play along by calling him Nic, by referring to him as 'he' and by not mentioning his femaleness when it is not relevant, which is most of the time, so long as he doesn't impose it on others. Transmen are less likely to impose, as (a) they are female, and as such are (on the whole) culturally less likely to impose themselves on others, and (b) because they are female-bodied, and as such are less likely to be physically able to impose themselves even if they wanted to.
Not saying much about transmen is not, as you seem determined to 'prove', because posters are unconcerned about women's rights, but because we are concerned about women's rights, and transmen rarely, if ever, threaten them.