That's what I meant, equal rights for every gender except I personally focus on women cause after all that's the core of feminism and how it started.
But woah, abolishing the concept of gender and sex? That sounds ridiculous. Sex and gender identity are facts that can't be abolished. They are not concepts. Gender roles can be abolished though because those are social. No more "women in the kitchen and men working" bs. Why not let couples decide? My dad stays in the kitchen a lot. Ironic, since he can be pretty sexist sometimes but at least he doesn't care about gender roles and gladly cooks all day. Or both can go to work. I talked about hetero couples here, obviously.
But tell me how we can abolish sex

I think gender identity is part of sex too and trans people have one sex (or no sex, or something in between) in the brain and the other in the body lol so we might want to readjust our bodies . So gender identity is like the "sex of the brain" (or lack thereof). And we can't really abolish biological facts.
However, we can stop assigning sex to babies by looking at their genitalia, or at least, doctors should be like "ok the baby has female genitalia but we all know there is a tiny possibility that the baby will be trans". Because when a baby is born with certain genitalia everyone automatically assumes its identity will match the genitalia. "It's a girl!" usually does not mean the baby has female genitalia, they also mean it's a girl and will be a woman in the sense of gender identity, so parents already assume things about the future life of their child. They will go buy pink stuff, toys for girls and will talk about boyfriends.
Society should acknowledge sex is not given by genitalia only. Or chromosomes only. There is the brain and the influences hormones had on the brain when the baby was in the womb, and that's far more important than pieces of meat between our legs.
Everything comes from the brain. Chromosomes = genitalia, but pre-natal sexual hormones = sex of the brain. Society focuses on what's easier to see (genitalia) and that's how they assign sex/gender. And this should be stopped because we trans people know how false this is.
But I assume that's not the logic that feminist used because she said we are the enemies

Well she is just a transphobe and hides behind distorted ideologies.
It's cis heteronormativity, folks. THAT's the enemy of LGBT people. If we trans people could come out easily and receive easy medical treatment and not be discriminated against by society, we'd be happier and we'd have no enemies. But right now, our biggest enemy is cisnormativity, not sex.
And I see many trans inclusive feminists attacking cisnormativity. And I am one of those.