563: One Person One Heart/Every Person has a Heart
Marco leaps at Squardo, and Squardo then reveals his reason. During this war, Akainu contacted Squardo about an agreement between Sengoku and Whitebeard.
Which is that Ace and the Whitebeard pirate crew will not be killed. In exchange for that the New World pirates will be annihilated., or something like that.
In the past, Squardo’s own pirate crew was destroyed by Roger.
The marines, knowing that, expected Squardo to go along with their plan.
And so they broke the news that Ace is Roger’s son. So that’s why Sengoku revealed the connection between Ace and Roger. (The implication between that Squardo isn’t a big Roger fan.)
And this explains Squardo’s attack. In actuality the Pacifista army had only been attacking New World pirates.
Whitebeard, who knew all of this, says something like “Even so, they’re all my sons!”.
Even though Marco is hit by a crewmate, he looks at Whitebeard taking a full on hit and confirms that he’s weakening. (I’m not confident in how I translated/interpreted this part, forgive me if it’s off.)
Sensing this, Whitebeard says “It’s impossible to be the strongest forever. Every person’s got a heart.”
And so this time the marines’ dirty plan enrages Whitebeard. It looks like Sengoku is also prepared, and the battle will begin once more.