Guys killing Adonis

I just started the manga after watching the 1997 anime, and the new arc 2 season (I didn’t finish yet the 2 season) but I feel so bad for Adonis .. I think I can’t forgive guts for doing that… mind blow, didn’t expect that! I also thought he will have later kind of : “ wake up man! Don’t let Griffith contrôle you like gambino”