I'm going to yell at my husband because he walked in on me making his Christmas gifts.
Did he mean to walk in on you making the gifts?
I don't think so, but he saw what I am making! What he did was rude.
If he didn't intentionally do it, I don't think it's something worth getting upset over. I understand being disappointed that he knows what you are making for him, but it seems like he didn't mean to walk in on you.
We're not getting along anyway. Might as well use it as an excuse to yell at him.
It seems like you are having bigger issues in your relationship than him seeing the Christmas gifts. If that's the case, you two should have an open discussion so you can try to work through the problems you are having.