Anonymous wrote:OP here- my kids are too young to get it. One is a baby (less than 1 year old) and the other is 4. I have focused on "normalizing" same-sex relationships (he doesn't think there's anything notable about having Uncle Joe and Uncle Bob) and I think it's too much to tell a 4 year old that there are people who don't accept them...like his grandparents.
PP here. I agree that at this age there is no reason to try to explain what is going on to your son. That being said, you can answer his question when he asks, why aren't grandma and grandpa at Thanksgiving honestly and say something like "They were invited, but they weren't able to make it. We will see them soon and we can call them later to wish them a Happy Thanksgiving."
I would also be straight with your parents and say that you are wiling to help them with any logistical problems they have attending family events, but you will not tolerate their efforts to disrupt the holiday plans of other family members because they are not comfortable with cousin X. Tell them you respect their right to make their own decisions, but that the consequence of that decision is that they will be alone on holidays. Tell them this makes you sad but that you simple disagree with them and must do what you think is right. A year or two of sitting home alone on every holiday and they will likely change their tune.