“These things are foul. And they taste even fouler.”
Gaak believes that death comes when it should come. Death is the one true lord, the one true power. These things, these zombies, they get in the way of the proper order of death. Things are killed. Gaak kills them. They stay dead, more fuel to the death lord. And now, now he has to kill things twice. Gaak finds this irritating. But maybe, if he kills enough of these things enough times, he’ll satisfy his gods anyway.