Thanksgiving is supposed to be happy, right?

So why does my family have to ruin it for me? One of my grandpa's said that I shouldn't go up to Utah for Thanksgiving because his wife was just sick, but then today he makes me cry because hesaid that it was bad of my mother and I to not come because my step-grandmother put so much work into the food. When he was the one who told us not to come, how can he do this to me? It's Thanksfuckinggiving. Family should matter more than anything, my grandfather shouldn't act like such a complete ass. What every happened to being nice on the holidays?