What Yassop did to Usopp and Banchina was wrong. But I had idea that when they both meet.

Yassop asks how was his mother. It becomes somber when Usopp says that Banchina is dead and she been dead for a long time.

Then we see Yassop just shut-down. Saying things like ‘No’ and 'That can’t be right’

Leaving them with letters wasn’t a good thing for him to do, but he is apart a very feared pirate group. All I think now is that he did that to protect them from us enemies.

Not talking or contacting them was the best action he could for their safety.

Now it doesn’t matter the woman he loved and cherish is dead. His only son probably hates him now.