[rightbyte]

"What matters is whether y is a fraud, not why x is calling them a fraud."

Isn't the "why" quite important? I mean, probably the one thing that is important? I.e., that the hater is a "hater" is not important, but why he is a hater. If there is no reason than the "hater" is unfounded.

I would argue that "hater" mostly is an ad hominem attack on someone. It would be interesting to know what haters bother P. Graham for. In general for being a kinda celeb? He doesn't write the "why" in his essay and neither tries to understand it, but argues they are irrational fanboys.