The UK system ain't that liberal.
Muggers let off whilst pensioners who don't pay council tax are immediately whipped inside?
Our benevolent liberal overlords don't really get too fazed if we plebs scrap amongst ourselves:- but if anything happens which challenges the authority of the Almighty State (i.e. their authority & position) then heaven help the perpetrator.
And if your perceived to be middle class (how the lefties hate the middle class), then using a water pistol to defend your home & family against armed burglars will as like as not see you incarcerated. The middle class could become a threat to the ruling elite, so they MUST be hammered into submission at every opportunity.