Head... desk...
The hijab is illustrative of the point that history doesn't always go forwards towards greater liberalism. Of course we all know it's more complicated than just the hijab alone, don't be bloody daft (or deliberately disingenuous). It's symbolic, okay? Women in Afghanistan used to be able to have careers, go out without a male chaperone, practice medicine, go to school... and go around unveiled. Now they can't. Human rights they used to have have now been removed from them.
The point Upstart and I are making with this example is that just because a group of people at a certain later time look back on how things used to be and say "they were different back then" doesn't mean things are automatically better at the later time - because there are concrete examples of things getting worse. Hence "being on the right side of history" is a painfully naive thing to say about history.
The second point though is that that the analogies transactivists make with women getting the vote, or with overcoming homophobia, should not be taken at face value. Women getting the vote did not take anything from men. Transactivism does take things from women (the right to ask for a medical practitioner of the same sex, the right not to be housed in prison with people of the opposite sex, the right of free association, the right to play sports against people of the same sex... the list is fucking endless). Also transactivism should not be compared to the fight for gay rights because a huge amount of transactivism is deeply homophobic (the cotton ceiling rape culture, the "trans-away-the-gay" approach to children who are non gender conforming).