In fairness, minor ***** like possessing small amount pot is considered a 'dangerous drug offense'.
The definitions of crime categories used in immigration matters are wacky. Crimes Involving Moral Turpitude (CIMT) - which makes someone deportable (regardless of their legal status) can be anything from driving on a suspended driver's license to shoplifting a 50 cent candy bar to murder. That's not even getting into offenses that may not make someone deportable, but might bar re-entry into the US if they ever leave.