you say a lot of shit on this site
The difference between oden and ace is that oden was already dead, there was no way to save him. If whitebeard had learned that oden was being held hostage by kaido and was going to be executed, he would also have provoked a full-scale war, but since the news of wano kuni did not cross the sea he was informed of his death afterwards. Whitebeard acted as a responsible father as always, there is no point in risking the lives of his children for revenge, it would not bring back oden in any way, it would just lead to unnecessary deaths. You don't come out of a conflict against a yonko without loss if you don't belong to the straw hats