Skinheads and neo-nazis in countries previously occupied by nazis are not uncommon. Now if someone want's to write a "Freudian" university paper on the subject...go ahead.
Not a Freudian, he was a freak, but I'd say that those quasi-Nazi are the result of some psychological need rather, than... well, no deeper though involved, obviously. I want to be strong, I want to be right, I want to be a warrior true (not like those 'anarchists' pampered by half of the press), I want to unite with my few chosen friends, proper men, seeing me a a proper man. Or woman, as we saw on the pics. I'd say one or another form of it happens all over the world, only in the Europe-influenced cultures it takes on the specific symbolism, equated with extreme rebellion against the mainstream. Everybody hates Nazis, but we are strong enough to raise the banner.
As long as the police doesn't really react -
the fact of the matter is that this behaviour simply shouldn't be allowed anywhere
- but why, actually? They are marching once a year, carrying posters, shouting things, raising hands. Freedom of expression. Once they start smashing windows, or littering the street, police should intervene promptly on the grounds of unprovoked property damage, and even act without prejudice, just to make sure the message gets through. I wouldn't really object if they were additionally charged with maliciously damaging the public property, i.e. police batons. Stupidity is a costly hobby. Or at least should be.
Attempts on denying them the right to walk streets curiously reminds me of the official reaction to the Orange Alternative. A street demonstration of garden dwarfs, the commie police reacting vigorously. And a toddler asking 'Mummy, why are they beating this little mister with a red cap? What did he do?' Well, he shouted 'Red caps good! Stop the persecution! Dwarfs will not surrender!'.