The point is that he'd still take not only himself but his whole family in war against the World Government for a dead crewmate, so Oden being dead isn't really something that should stop him from avenging him, following Buggy's depiction of the character.
They were going after Blackbeard to avenge Thatch, Whitebeard just didn't want Ace to go after him so recklessly and alone for obvious reasons that both Shanks and himself were well aware of.
They were going after Blackbeard to avenge Thatch, Whitebeard just didn't want Ace to go after him so recklessly and alone for obvious reasons that both Shanks and himself were well aware of.
I dont see by any means that equal as oden vengence.