"The FACTS are SOME men, in ALL times, in ALL places, will ALWAYS try abuse, steal, deceive, suppress others -even, PHYSICALLY- who are in their way for whatever goal they pursue.
This is human nature."
Saint Augustine came up with this notion over 1500 years ago.
You're both wrong though. People are a result of their experiences.
The problem though is not that you are wrong, it's that your philosophy is inconsistent and makes you an enabler.
Any such force which seeks to curtail the predation of man by men, will be comprised of men, and is therefore a failed notion.
Furthermore, by seeking to create constructs of control by which to prevent predation, there has been established the first objective of a predator – the creation of the means of control.