I don't think it's "hating" when someone claims that a P Bass is sufficient to do everything. That's love for one's own instrument (boy, that really sounds dirty, but oh well). P Bass players (at least in this thread) aren't claiming that no other instrument is worthwhile (that would be hating), they are merely claiming that their own favorite instrument is good enough for everything (that's loving). See the difference? Lauding an instrument is loving it, not hating others. It's hating when someone jumps into every thread like this one, and claims that an instrument is no good, and it doesn't matter what the instrument is.
I don't get it, though, you don't see people jumping into the Warwick (or whatever) threads and saying that the Corvette can't play a certain genre, so they should get a P Bass instead. You only see people jumping on the haters bandwagon when you mention Leo's products.