The way I'm looking at it is simple. Emma and Marco are just trying to have a laugh, Jason and Victor have been soar about the girls return all night.
The physical violence is unacceptable, and it came from Victor and Jason first. Their still at it now, swearing and shouting. Victor tried to provoke another argument over the girls seeing the footage.
They are just not to be trusted in the house, they have shown physical threatning behaviour, end of story - they should go...
If they stay I'd be tuning out, there is no excuse for lack of action.