OK, here is your main error: you equate ancient Greek pederasty with Nazis or American slavery. They are not even remotely similar.

I said that the Greek practices seemed to have no ill effect on society, or most poeple who took part..I'm not saying WE should view it as right.

However, Nazism and slavery have had terrible and long-lasting consequences which in some ways the world has still not recovered from--and may not for hundreds of years.

For instance, Africa itself was horribly damaged by the slave trade; whole generations of poeple were stolen away, whole villages dissappeared, families were split up, tribes fought against other tribes, and so on. The sorry state of affairs in Africa today have deep roots in the European slave-trade.

Similar things happend in Eastern Europe becasue of the Germans. The Jewish holocaust was just one part of an even greater destructive program that scarred the region deeply.

Morality is a complex thing, and simplifiying it gets you into all sorts of trouble.