It is bad to beat up others.
Sam's wife Ann is pickpocketed by  some petty thieves while they're vacationing in Europe.
Sam wants to seek revenge on the thieves.
Sam locates a group of police officers, explains to them what had occurred and requests the police to arrest the thieves.
Sam locates the thieves and proceeds to physically assault each one of them until his inner violent appetites are satisfied.
Ann is happy to have a husband who uses his brain to solve problems instead of resorting to his lizard brain at all times.
Ann is horrified that her husband is behaving like a criminal himself and utilizing barbarism in seeking revenge.