Sorry Grab but you exaggerate in order to try to prove your case. Yes there has always been violence, and there always will be, but you seem to be excusing today's violence on the grounds that we and our forebears started it.
Violence today is far more widespread than it has ever been, as you yourself pointed out it was more localised in the 50s and 60s.
You sound as though you are quite happy for it to continue just as long as you can blame someone else. While making sweeping statements about the treatment of children and wives pre 1990, and you condemn the whole of the police force while you do so.
What we need to do is condemn violence, and anti social behaviour and look for ways of reducing them, not look for excuses for them!
Giok