What Trotsky meant by "Solidarity"

Prepared to fight to the last innocent bystander, the dependably irritable and violent Greek leftists engage in a sympathy violence:

Greek anarchists attack French schools, back rioters

«ATHENS: Groups of anarchists broke windows, threw paint and spray-painted slogans at French cultural institutes in Athens and northern Greece in support of rioters in France, Greek police said on Friday.

About 50 people, wearing hoods and helmets and carrying red and black flags, threw stones, spark plugs and bottles filled with paint at the central Athens French Institute on Friday morning, breaking windows and damaging parked vehicles. Police said there were no injuries and the group dispersed quickly after the attack.

Another group attacked the French institute in the northern city of Thessaloniki on Thursday evening, smashing windows while classrooms were filled with language students. They spray-painted “Rioters Are Right” on the front of the building.

“They just appeared out of nowhere, I think about 70 or 80 of them. They smashed everything and we just sat there terrified,” one student told reporters. Poor French suburbs have been hit by two weeks of rioting. French police have arrested hundreds of people in what is considered the most serious unrest since student-led protests in 1968.»

With thanks to Tom P. who is given to calling this the "Evian Flu". Why not The “Contrex Flu”, Tom?