Why my parents hate my black boyfriend?

Hi, I’m Jullie. I'm 17-years-old and I'm pretty much your average High-School Senior, but lately, I've started to question everything about my life and my family. You see I was raised in a typical suburban neighborhood with a normal family. I never considered myself to really be sheltered, but I guess in some ways I was. I guess you would call us upper-middle-class. We have never been rich but never had to struggle either.
I think living the way I did growing up kind of isolated me from some of the darker truths of the world like racism and bigotry. I never really understood what it was like for people who had to deal with these sort of things all the time. That all changed though when I got some real-world education about hate. What really surprised me, however, was what I learned about my own family
So let's go back a ways. My story starts with a guy. His name is Jaydon and he is pretty much a dream come true. He's really good looking, but I wouldn't say I was really that attracted to him at first. I thought he was cute, but I just didn't see us being more than friends. All I knew at first was that he could make me laugh more than anyone else, and really to pass the time when you're waiting for school to be over, there's nothing more important than a good sense of humor.
So the first day we met I just remember him smiling and making jokes. He was so nice and just different than the other guys at school. He was New to the school and one of my friends was showing him around. To be honest, at my school he was probably one of only a few black students. I never really thought about it, but it must feel really weird to be in a new school where nobody looks like you. I probably would have been nervous. Jaydon wasn't though. He just tried to be friendly with everyone and make a good first impression. It definitely worked on me.
We started talking more and more and I started liking him more. He transferred to the school because his dad is in the military and they move a lot. He said he wants to join the army when he turns 18, which I think is really cool. He's a really mature person and he knows where he's going in life. Most people our age don't have their life together that much. I know I don't.
Anyway, as we talked and hung out more, we becAme good friends and eventually started dating. We had so much fun together and I really felt like I was starting to fall in love with him. We were going out for a while before I even told my parents that I had a boyfriend. I knew once I told them they would want to meet him and they would have a ton of questions. I just didn't want to deal with all of that, but eventually, I had to break it to them.
It was kind of weird and awkward for everybody. My dad looked like he was upset that his little girl was dating, but tried to hide it. My mom just asked me a bunch of questions about if he was nice, where he was from, and how serious we were. I could tell they were both a little nervous. Once I told them about his good military family, good grades at school, and how well he treated me, I think they felt a lot better. So of course, they wanted me to invite him to dinner.
When he came over for dinner, I remember how nervous he was. It was cute. He wanted to make sure they liked him and I could tell he was really worried. I told him that he didn't have to worry because I already told them how great he is. When he first came to the door, my parents both got kind of a weird look on their faces. They looked surprised and confused.
We had dinner and it was the most awkward thing ever. My mom and dad were unusually quiet and seemed very cold and not friendly like I'm used to them being. After Jaydon went home, my dad just went into the other room and didn't say anything. My mom was asking me questions like "you know there are plenty of other guys out there right? Are you sure about him?"
I was so confused. He didn't do anything wrong, but they were acting like he was someone I shouldn't be around. It didn't make any sense, but a little later I figured it out.
When they thought I was in bed, I overheard my parents talking. They were saying things like "I thought we raised her better than this." And "all the boys in school and she has to pick a black one?" All though they didn't even say black, they said something a lot worse. They just decided not to like him because of his skin color. I don't get it. I wasn't taught to be racist and I never would have thought my parents were.
I'm so angry, and I feel betrayed by my own family. I feel really alone. I still love my parents, but I just wish they could see Jaydon for the great person he is. I don't know if there is any way to make them see.
What should I do?