How do you deal with it?

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My husband of 3 years has recently been taking his beliefs very seriously, to the point where he's decided he's not going to celebrate any holidays or birthdays. He has the freedom to believe in whatever he wants but I don't agree with any of that.
It effects our relationship a lot, I refuse to go along with whatever he is but still try to be supportive. He just gets mad anytime I try to do differently than what he believes so we fight a lot. :( 
we have a 1 year old son and I wanted to have a bday party for him and he got mad about that. 
I told him I was having one, he doesn't have to be there if he doesn't want to but he just got mad and says I am just trying to make him look like a a$$hole for not being at his sons bday party??
Is that wrong of me to do that? This happens with every holiday pretty much. 
How do I deal with it or go about it??