I disagree with the first sentence. A crime cannot be abnormal. It can only be the person committing some criminal act who MAY be abnormal.
The above paragraph presumes that all persons who commit crimes are psychological abnormal, which is far from the truth.
Certainly, our early childhood home environment plays a very large part in our future behavioural patterns, but just as many people growing up in an "abnormal" home environment grow up to do great things all within the law.
Statistics state in almost all psychological and sociological text, that a person's personality is roughtly 50% nature and 50% nurture. I.e. it's both genetic and early life experiences that pretty much determine what kind of adult we will become
Catherine