Even when I've been out of that crazy house almost a full year now, I haven't truly escaped her. She keeps calling me, harassing my brother and I, threatening us and screaming at me, and I can't stop it.
She called me last night and told me that I'm an abomination against nature and that people like me should be put down. She detailed what she thinks, at the very least, homosexuals and other "abominations" should be restricted to in conduct, such as never reproducing, having no contact with children (this came about because she got notice that I watch my niece sometimes), shouldn't be allowed to own property, ought to be held in containment facilities (along with her other favourite targets - immigrants and hippies) and marked with a visible insignia identifying us to the public at large.
She suggested fire-branding, a nice touch on the insane little diatribe, considering she gave me a nice taste of what branding would be like when I was under her roof. I know it's completely mad - but that doesn't make it hurt less.

I'm just so tired of it, and the ramblings of an insane woman shouldn't rattle me, but they do, and sometimes I think I'm going to go insane. I go from being relatively happy during the times when she's not inserting herself into my life, to sick with depression the moment she does something like this.

God. Why doesn't she just go join those freaks in Kansas? They'd probably get along great. She hates fags - they hate fags. She hates Jews - they hate Jews. She hates America - they hate America. It's a match made in heaven.
Well, not heaven. Maybe purgatory.
FUCK FUCK FUCKING FUCK FUCK.

I can't even imagine how much that would hurt. Mentally unstable or not, it has to be hard to deal with. My parents aren't especially happy about me being a dyke, but they've never said anything as horrible as that.

The only thing that I can think to tell you is to try to ignore her. Remind yourself that she's insane and don't talk to her. Ignore her calls, change your number, whatever you have to do. No one should have to put up with that, especially from a parent.