Among the closest thing we have to fascists in modern Britain are people who call themselves ‘anti-fascists’. Not all people who call themselves ‘anti-fascist’, thank goodness. But a sizable portion.  If you ever see these people in action you will notice that they behave in exactly the way you would expect their alleged opponents to behave. It is not just their behaviour (screaming, shouting, marching, fighting, threatening, brawling etc) that is so evocative of fascism. It is the belief that their rigid belief system is the only correct one and that all opponents are ‘scum’ who must be ‘smashed’ (this really is the language they use).
http://blogs.spectator.co.uk/douglas-murray/2013/05/some-anti-fascists-are-very-fascistic/