If a Christmas tree gives you problems, just hang dreidels on it and think of it as a marketplace of ideas. Do try to keep in mind that a Jewish spouse coming home to a wreath on the door is subject to cardiac arrest, and then you'll need two wreaths on the door. Strings of lights around the house are pretty easily explained, since you're on the approach to the airport anyway. Just tell your spouse it'll lower your Homeowner's. Stockings next to the fireplace won't generally raise the hackles of a Jewish mate unless they're stuffed with rosaries.
Hard candy is always nice.
His mother did. Don't push your luck and expect your Jewish spouse to get on the roof to install a plywood Santa and reindeer, however. Jesus, after all, was the last Jewish carpenter. If you don't go, don't worry if everybody gets all worked up. If they light torches, worry.