<< You seem to be operating with the hypothesis that "justice" and "vengeance" are always exclusive of each other. >>
There might be some unlikely case in which the actions taken out of vengeance are similar to the actions which would have been just in that case, but I don't know of any example right now.
<< Try substituting the word "punishment" for "vengeance" and see if your logic still works. >>
Punishment is similar to vengeance.
<< IMO, sometimes justice EQUALS punishment. And punishment should equal the crime. >>
'equal the crime'? Eye for an eye? Respond to death with more death? The spilling of blood with more violence?
Sounds rather foolish to me.
<< You drive too fast, we (society) give you a speeding ticket. >>
Ignorant of the reason why people don't want to obey speed limits.
<< You drown your own kids, we kill you. >>
Ignorant of the reason why the person decided to drown his/her own children.
<< Seems fair to me. Seems like justice. >>
You've yet a lot to learn.