User blog comment:Xilinoc/Ch. 552 - The Fundamental Virulence/@comment-7092747-20131009003144/@comment-11051098-20131009151341

The explanation of why Quincies hate Hollows so much, also explains why Yhwach didn't have any remorse from killing Luders and Ebern.

Ebern failed to steal Tensa Zangetsu, and Luders talked about the future, both things that probably annoyed Yhwach. But if this theory is true, he probably killed them mainly because they were Hollows.