> people A did X bad things to people B thus people A are responsible for demise of people B
In this case, people A are responsible for most of the demise of people B, surely. I don't deny that history education should be improved on these matters, instead of choosing a villain and a victim, but your view is not much better.
no that's simply not correct or backed up by any historical data. as the saying goes "it's easy to fool someone but hard to convince someone they've been fooled"