It wasn't just those 3 clubs. Actually, most of the Alliance players met with the same situation.
This also included those clubs that Ruling Sword was very close with. Those Horde players killed whoever they saw. As long as they were an Alliance player, they were a target. In an extremely short amount of time, thousands of players were slaughtered.
The forums called this the beginning of the 'Citadel War'.
To begin with, all was peaceful. Everyone was willing to fight together to resist the Burning Legion. It was a shame that this only lasted a short we hile at thStair of Destiny. When the center of everyone's
activity shifted to Honor Hold and Thrallmar, clashes were unavoidable.
By the time the three Instance Dungeons of Hellfire Citadel had been opened up, a large, shapeless hand had ignited the flames of war.