It surprises me that you assume heroin addicts who often turn to dealing and smuggling to feed their habits are inherently evil people, most drug addicts have mental health issues. They are usually damaged people in the first place.
As for the terrorists sentencing I think you'll find the higher up the chain to you go it's harder to prove culpability so authorities will tend to charge based on whatever they can get them on (eg inciting violence for a hate speech).
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