There is no Santa.
Your parents have just been lying to you because they're trying to soften the blow for when you find out there's no Jesus.
They really do have your best interests at heart. However, to ease the tension, try to mention on the sly that you know what's REALLY going on.
kid: I sure hope Santa comes back this year
Mom: Oh, I'm sure he will </knowingly>
kid: After I found out there's no Jesus, I was afraid you'd been lying to me.
Mom: But... how... why.....
kid: But now I know there really IS no moral law except for greed.
Mom: That's just crazy talk! Of course there's a moral law!
Kid: Did you get me good presents?
Mom: Of course. I love you.
Kid: I sure hope Santa comes tonight.
Mom: Oh, honey, I'm sure he will.
Kid: wanna help me say my prayers?
Mom: Not tonight honey. Mommie's got to drown the pain of knowing her son is a filthy heretic.
kid: That's fine. I'm just glad I don't have to pretend I believe in TWO people that don't exist.
Mom: At least there's still the Easter Bunny.
Kid : GODDAMNIT.
This is a song about death. It's on mandolin.
Hate is the first step to all solutions.
You will not end bigotry until you learn to hate it.