People are afraid of unfamiliar things. Take me for instance. I have Autism. I have to reherse everything I do. If something happens unexpectedly, I panic because I'm not used to it in my life.
The same applies for people's reaction to me-they are usually startled because I act different than what they're used to. Perhaps you feel the same about homosexuality-you haven't been exposed to it so it doesn't make sense to you.
In my opinion, as long as you aren't being discriminatory and you respect everyone , don't worry about it. There's plenty of things people don't understand or agree with. I don't understand people who spend $50000 on a purse but it's not something I stress over.

Part of acceptance is accepting that not everyone "gets it". I've learned this with my disability.