Was threatened to be beaten by my own parent for reasons I don't understand. I'm just really confused also scared. don't think I will be coming to Christmas this year
They probably also don't understand and anger is the only emotion they can muster up. I know its hard for the older generations to accept that their kids might grow up and not marry the opposite gender, have 3 kids and a white picket fence. They have probably never met (or realized they met) anyone transgendered before. They need to be educated, but they aren't going to take the time to do so if they're still so angry about it. Sometimes you have this idea of what your kids will be like, and some people go through a grieving process for that idea/image if their kids end up different than they imagined.
I would definitely keep my distance for safety reasons, but I don't know if I would disallow contact. People do change, realize they've made mistakes, or learn how to build a new relationship with their REAL child vs the child they wanted. We just have straight up assholes in our family, just hateful all the time just because. But I would bet that your parents and family are dealing with a whole slew of issues related to your transition. It's a very personal subject for you, but its also going to become a personal subject for everyone in your family as they take in this information and figure out how they're going to process and handle it. If you withdraw and cut contact, you're making that choice for them if they're going to accept you or not.
With that said, I, or most anyone, wouldn't at all blame you for never speaking to any of them again. That's such a hard call, and its one only you can do. You've mentioned before that they weren't being supportive.