Justice isn't something to be made up.
Justice is getting what one deserves.
Thieves deserve to pay restitution.
People who harm others physically deserve to be punished corporally.
Murderers, adulterers, homosexuals, people who commit bestiality, rapists, all deserve to be put to death swiftly and painfully.
God says that when justice is not swiftly enforced, men commit more crime.
All what you say is real if the crimes are not approved, by the men in charge of the ruling system (religious or political), to be committed for the good of their system.
It seems you never heard of a national army whose mission is invading foreign lands and its heroic troops are legitimately allowed to kill, steal and destroy under the pretext of protecting their nation. There are even nations (of the past and now) that consider these crimes as holy if committed in the name of their God (Allah and others).
What in the world does that mean...?
It means that, if you are a mature person, you cannot change even your main priorities in life
So if I were to beat you to the ground, take your wallet, assault your wife and daughters in front of you, and then kill you and your entire family, it would be evil to impose the death penalty upon me?
You clearly need to reread what Jesus said then, because he certainly did teach law (rule), in addition to love.
This is one of the reasons for which I didn't marry
And since I had no interest at all, since I was teen, to be rich or be famous all members of my family (excluding my dad who passed away when I was 9) were also not interested to see me one of them
Finally, if someone will feel the need to kill me, it would be the will of God not of the killer... much like being killed by a bacterium or alike.
In brief, I am, since long, no more of this world