I haven't read the whole thread, but I've been playing for twenty years and seen (and participate in) a lot of Elf Hatin' going on.
My personal reason for hating elves, and many people seem to share these, are two-fold:
1) Of all the races, Elves have the twinkiest advantages. This has been slightly balanced over time, but back in the day they got bonuses on long swords and long bows, long swords being the most common of magic weapons. They got bonuses to detect secret doors, while dwarves got to detect sloping passages. Elves could be magic-user/fighters.
2) The worst twinkie players I've ever met all played elves. One of the absolute worst players I ever had was obsessed with elves and ALWAYS played an elven fighter-wizard-cleric. Later it become the Drizz't thing, and by 2nd Ed. every powergaming twink dork was playing an elf who wielded two long swords which he was specialized in at first level.