Jace Hall and Felicia Day is just hollywood entertainer who use mmorpg or games to make themself popular,

if you want to see how everything/rivally started,

first go youtube search jace hall interview Felicia Day

the next part is in jace hall interview blizzard, where he ask a Gm to gank Felicia Day Undead DK toon

the 3rd part is in this i play wow, Felicia Day name is mention on the song lyrics