Sorry about the bad turn out but you had to tell them.
You will find a loving relationship one day, it will replace the love you are not getting from your parents. My daughter is gay, it's getting easier for her but still difficult in some areas. I never cared, but like others let all my kids know early I wouldn't care at all.
All you can do now is hang around supportive people, enjoy their embrace and let it go. Obviously, reading through here, you can see that the majority of people are fine with it. Some will still grasp to the religious propaganda. They aren't yet free themselves. You will find the older you get that their will be a lot of things old people can't wrap their heads around. Old dogs, new tricks, lol. Not!
Imagine how hard it would be to still be as limited in thought as your parents. It will only hurt them. Accept them as they are, say a prayer or kind thought for them and move on through it. Heterosexual kids have to move on as well. Parents aren't good partners after you're grown. You will make your own family who accepts you now, everyone moves on.
Even in a good relationship, parents roles are over at your age. It's the parents choice at this time to sit back and enjoy you as an adult or not. It's their loss.
You can always adopt a partners parents for support. It doesn't have to be yours you get acceptance from. It's ok to just feel sorry for their closed mind, it's their torture, don't take it on yourself. Being gay isn't a sin or a crime against anyone, you are normal. They are the ones who need counseling, not you. Keep that in mind.