Glad someone bumped this thread - cheers, Bloom.

I am going to "kill Christmas" for all my sister's children, when she has them.
Hmmm, I hope this isn't true. I get you're upset that your son now wants to believe in 'farmer' christmas (too cute!!) because sister and your mother didn't respect your parenting choices, but killing christmas for innocent children to get back at another adult is really mean

I'd just do what N2L said Good ol' Farmer Xmas