A few years ago, a parent in our school sent a rather rude letter home asking that no gingerbread homes be made because it was a Christian activity (but we can still play the dreidel game). The following year, my friends who is Muslim said, if we are going to talk about the dreidel and Hanukkah, then we need to talk about Eid. Exhausting! I would love for you to talk about them just not out of retribution.
Final piece of advice---worry about your own child. Do not send a letter to the entire school prohibiting gingerbread houses and stop worrying about the entire school playing the dreidel game. Make sure your own child understands the importance of learning about others cultures, is willing to share his/her own and stop being so offended all the time!!!!