Nope. As someone who has seen and been through 'horrendous' things, I still don't have the overwhelming urge to go out and stab innocent people. It's all down to 'nature' and 'nurture'/'brainwashing'. Most people who are subjected to certain difficulties (poverty, abuse, discrimination) do not take out their problems and frustrations on the innocent. If someone is not right in the head, they never will be no matter their circumstances, whilst others are easily manipulated into committing various acts or taking a certain path through life.
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