"It's wrong for tany to try and kill Bucky but it's ok for Peter to shoot Ego and T'Challa to go after Bucky?"
Yes. Yes it is.
Ego was a dick and he, of his own FREE WILL, put a tumour in Peter's mother's head. He chose to destroy her life out of selfish reasons. Peter had every right to blast that guy.
T'Challa didn't know Bucky was brainwashed or that he wasn't behind the bombing. He went after someone he though was responsible for his father's death.
Turbulence Skunk knew Bucky wasn't in control. He even made a nickname out of it. Beyond that he saw a glimpse of what Bucky's life was like by the cryo tanks, the suspicious looking chair in the middle of the room, and the overall dismal living conditions. It doesn't take a genius to figure it out which he either is or isn't depending on what favours their argument. He also had Steve yelling it at him as a desperate attempt to stop him from murdering his best friend.
And no "you would do the same" garbage argument doesn't justify it either because I went my entire life not wanting to murder anyone no matter how mad they made me it's really not that hard. And just because you're willing to kill an innocent person doesn't mean it's automatically ok it's still wrong and against the law.
To quote Corpsman Dey "That's actually murder...It's one of the worst crimes of all...Also illegal"
So keep on trying to justify murder because you'll always be wrong.
