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When you struggle to get a job, your schools are overloaded, not well funded, you are forced to ghettoisation, get reminded every day you are not welcome or hated, get considered a criminal by default by ignorants like you, the odds of taking the wrong path becomes quickly much larger.
This is very close to magic dirt theory -- I bring a horse into a pond, does it start acting like a duck?
This theory contradicts the fact that immigrant groups with high crime rate also come from countries with high crime rate, where racism is not a plausible postulate.