What a despicable human being.
It makes sense why Peace tried to stop everything by jumping from the bridge. His father has no other way to attach his son's loyalty than threatening him and keeping him on a leash by fear alone. He is incapable of using true love or true care. He only knows to reign by cultivating terror. Fear and intimidation are his best weapon. He mold his pawns in the way he wants and when they are not useful anymore, he tosses them aside in a very brutal way.
It doesn't matter if you are related to him or not. He adopted Jihoon and Junho, but I'm sure he wouldn't hesitate to kill them if they make too many mistakes or are not useful anymore. They don't mean anything to him... and that's also true for Peace, to a lesser extent.
I think we all know that the answer is yes. He would if Peace doesn't comply to all his demands. Peace knows it too. He is a prisoner in this life and he can't make the choice he wants. Everything must be done according to what his father wants. He has no one around him (except Sun now) that cares about what he desires or wants. Jo controls everything and even the small things he has for himself (his passion for photography, the art gallery…) are just conceded to him and can be taken from him at any point. There are just another mean to control him.
Jo said that there is a reason for all his actions, but he never takes the time to explain them to Peace because he doesn't feel like he needs to know them. In a way, Jo knows that power is a fragile thing. It tolerates no threat and the better way to control everyone is to not give them all the information, so they will only do what you want when you want them to do it.














