Is it normal that i reject family values

I'm sorry you felt like you couldn't disagree with your parents up till now. They're just people, you know.

I also grew up in a religious family, but my faith has changed a lot growing up. That's natural and happens to everybody. A believe that isn't evolving is dead.
But I often would talk to my parents about questions I had and things I didn't agree with and so we all kinda grew together, and their faith has changed too. In a good relationship of any kind it's important to have conflict. And I don't mean war. A philosopher once said: "War is no conflict; It's the inability to have conflict."
Meaning the moment you can't talk about something - The moment you can't disagree, you stop growing and start fighting instead.

Okay, that was probably quite unhelpful, as you can not change the past :P
But I'd suggest easing into it and talk to your parents more about things you disagree on. Show them your thought process behind it without being hostile. Maybe they'll surprise you. Nobody's ever too old to change.

I was in a similar situation. My parents are religious. I am an atheist. But things turned out okay for me, which was quite surprising because I thought they might not accept me after I told them. Well, you never know. People can surprise you. You are their son and if they are good parents, they will love you no matter what.

Thak y'all for the advices!