Earlier quoted context omitted.
German law covers this in §32 StGB ("emergency defense"), which includes emergency assistance. If people were reasonably convinced that he was threatening others, they're done & out clear. P.S.: in German law, it's actually a crime to _not_ render assistance to others in danger - StGB §323c ("failure to render assistance")
German law has extraordinary self-defense statutes, both civil and criminal. The following applies to criminal self-defense: Any ongoing[1] illegal attack on any legal right may be warded off using force, including insults (that's an attack against personal honor). The force does not have to be proportional, only necessary (it must not be more severe than another one that would lead to success) and effective (it must…
Uninvited guest shows up to the party, you should call the police.
Seems like there were 0 cool heads and everyone involved is guilty of something.