oyyoyyoy – If Nekama is not wrong, then why, in Av haRachamim, do we only ask HKBH to take Nekama on those who persecuted Klal Yisrael? Those we’re referring to are not Jews. It therefore seems that Nekama as such is not for mankind, absent a specific command from G-d (such as in the case of Midyan and Amalek).
That is not to say that Nekama for the sake of creating deterrence is wrong, of course – that is part of protecting lives. It’s only Nekama for the sake of Nekama that is best left to G-d.
an Israeli Yid