User blog comment:Xilinoc/Ch. 630 - The Twinned Twilight/@comment-25603404-20150611195423/@comment-1210805-20150612023428

Bazz believes that if he kills Jugram while he has Yhwach's power the power will die along with him, rather than reverting back to Yhwach as it apparently does during the day.

Bazz calling him a traitor is because Jugram knew that Yhwach would kill the other Quincy to take their power.