Earlier quoted context omitted.
The US has an order of magnitude more crime than Europe but is policed by roughly the same number of officers. That, justifiably or not, leads to short cuts where extrajudicial and unjust tactics are used to enforce compliance.
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You don't have to "probably." You can look this up. Baltimore had 3 times as many homicides as the entire country of Sweden last year, even though Sweden has 10 million people and Baltimore has under 600,000. And it's not "drugs" or "guns" because Sweden has plenty of guns and a harsh anti-drug regime.