Who said people cant solve problems without violence?
Basically, chavs fight these days because of mental attitude, they get drunk off super strength lager lose senses and will fight or as often the case just start attacking any old stranger.
The OPs friend has stepped over the line of trust and the unwritten rules of what you do and dont do with their partner, its a mixture of emotion and anger.
Reasons and lack of reasons are the difference.
Forget trying to not upset him. Tell him straight and if he still doesn;t get the picture do a Del Boy on him and say "let me run this by you to see if you understand" and then hang one on his chin
You might all be getting the wrong impression. It's quite possible she keeps secret emergency bacon in her back pocket - he's trying to steal it.
stop **** blocking him tbh...