Isn't that blood elves anyway?
1) Literally destroyed the Sunwell, then their prince tries to use it is a gateway for Kil'jaeden.
2) Betrays the Horde twice, first by defying Garrosh, then Sylvanas, thus breaking their blood oaths to the Warchief.
3) Tries to go back to humans, only stopped by Jaina literally doing pest control in Dalaran.