Same law applies but in practice , the main issue is the interpretation of behaviour.
The family ARE a rag tag band of CRIMINALS but placing flowers at the site of a death happens as a matter of course in the country.
You could find an argument that the main aggression is coming from the onlookers - SERIOUSLY?
The simplest solution is for people not directly involved to stay away and let the matter fade - WOULD YOU SUGGEST THAT THE WHOLE STREET IS REHOUSED FOR THEIR OWN SAFETY THEN?
I hope that you didn't mind me altering a few words, because I think your moral compass needs resetting.
Just to remind you.
The Vincents are the criminals, not the residents of that road.