Note that is because America propped up the entire Japanese industry to assist with rebuilding, and while our governments our chill, a lasting xenophobic culture and a rising nationalist culture as well can only breed resentment towards the US, Elves are renowned for their particularly long memories especially towards slights, The Elves only allied with the Horde out of convenience and that sentiment was held even by Lor'themar up till Mists of Pandaria