I can relate to this question because I'm in a multi cultural marriage. Does he want to put up Hannaka decorations? If he does, then it's only fair for you to put up a few Christmas decorations too.

If you are thinking about marriage, then you both need to get this straightened out before you marry and decide how the kids will be raised. I agreed to raise my kids based on his religion but we decided to keep Christmas celebrations too - the whole Santa thing was fun for the kids. I'm fine with the kids identifying with his religion.

ATM it's up to you if it's worth fighting for. Before I had my kids I didn't put up decorations and I was fine with that. But he agreed to do the decoration stuff for the kids. Work it out when and if you plan to get serious. Good luck.