I think that it's important that Roger made enemies out of other pirates and the Government alike. Ace has to contend with his father's reputation even as a pirate.
I also believe that this scene with Squard is very prescient with what's happening in the real world right now. Ace was never Squard's enemy, but the world powers were able to take Squard's very real issues with Roger and twist them into a weapon to use against himself. Powers and governments can and do make convenient scapegoats and sow divisions with the intent on drawing attention away from their own corruption and incompetence. If the enemy is squabbling amongst themselves, they can't collate into a problem to the establishment.














