Im not sure that man want a revenge, i think he jusg want his body parts back. He never showing intense hatred towards white haired guy, or atleast for now
They eat people. OK. @davremedy What are the odds. @Rockdrop Isn't it shared backstory of two? @Flavor25 let's see... Infiltrated a guarded temple with a lie(?), activated spirit trap, did not bothered to give any explaination before snatching the arm and thus lead activation to the completion. Even if you omit using moryou on head priest I'd say they have everything to do with temple destruction.