User blog comment:HanataSanchou/Expect The Unexpected/@comment-25926617-20160402152005/@comment-24850639-20160404190639

Props, I REALLY like that idea. Since Whitebeard was widely acclaimed as the strongest man in the world, and Kaido himself is the strongest "creature", he probably felt WB was the only person that could fulfull his death wish. No better way to get Whitebeard pissed at you, then to try and cut him off on the way to Marineford to save one of his sons. With Whitebeard gone and him losing his biggest rival, he's probably feeling a lot like Shiki felt after Roger passed. Since there's no one left who can kill him, he just wants to destroy the world altogether.