They are always moving the goalposts (so to speak) on the years defining Baby Boomer and GenX. I was born in December 1964 and have always considered myself GenX (I prefer Generation Reagan). I have nothing in common with the Boomers and pretty much despise them.
They are not. 1964 has always been the last year they assign to the baby boom generation. I was born in '58 and have siblings born in early '60s so am aware of when the cutoff has always been.
Like others, I find it absurd to lump people in a category like that and say one despises "them".