In Europe, even if the police have guns during an arrest, they will generally not be pulled out unless the detainee is armed (possibly with a knife) and resist

In Europe, even if the police have guns during an arrest, they will generally not be pulled out unless the detainee is armed (possibly with a knife) and resisting. An unarmed resisting person will generally be tackled and restrained without pointing a gun at them even if one is "present" - there are quite strict procedures against escalation that seem to be missing or ignored in USA.