I mean, I am sure a lot of people saw BB and his connection to Rocks and naturally, suspected Xebec must have been quite a bastard.
But he is actually reasonable and honorable. Wild, sure. But Rocks strolls into Mariejois just fighting and got to Imu. BB is trying to avoid as many fights as he can and clearly refuses to pick fights he cant win. That man is the absolute opposite of Rocks.
Rocks loses, he will prepare and vows to return.
BB got bitchslapped by WB and tries to play the emotional strings by being a little bitch to try and gain an advantage.