The CIA and its friends have been active in Greece for some time.
1. In 1944, in Greece, a large demonstration in Athens, against British interference in the government, was dissolved by gunfire from hidden soldiers.
25 protesters were killed and 148 wounded.
2. In 1967, in Greece, CIA-backed colonels carried out a military coup, resulting in a 'fascist' dictatorship.
Thousands of Greeks were tortured and murdered by the CIA backed 'fascists'.
(NATO's Secret Armies: Operation Gladio and Terrorism in Western Europe - Google Books Result )
3. In 1985, 15-year-old Michalis Kaltezas was shot by a police officer, triggering violent clashes between youths and the police in Athens.
4. In December 2008, Greek youths rioted after the police shot a boy
15-year-old Andreas Grigoropoulos was shot dead on 6 December 2008 by a police officer.
Witnesses told Greek TV the policeman fired directly at the boy.
The CIA, reportedly, has used acts of terrorism to keep the right-wing in power in Greece.(The following is from: Killing Hope: U.S. Military and CIA Interventions Since World War II - Google Books Result)
"In the April 1967 national elections in Greece, the veteran liberal leader George Papandreou seemed certain to be re-elected as prime minister.
Papandreou had been elected in 1964 with the only outright majority in the history of modern Greek elections.
A joint campaign by the Greek military and the CIA to unseat him began immediately...
The Gladio 'Sheepskin' group was involved in a campaign of terrorist bombings, which were blamed on the left, and two days before the election campaign was to begin, a military coup brought to power a junta led by George Papadopoulos, a member of the Greek intelligence service KYP.
The CIA had created the KYP and Papadopoulos was on the payroll of the Agency for some 15 years.
Along with hundreds of other KYP officers, he had received training in anti-subversive techniques in the United States.
Papadopoulos was "a great believer in Hitler's new order" ...
He plunged Greece for the next seven years into a nightmare of martial law, censorship, arrests, beatings, torture and murders.
8,000 were killed in the first month alone.
Before the end of the year, Amnesty International reported that "torture as a deliberate practice is carried out by the Security Police and the Military Police."
The Greek junta contributed $549,000 to the 1968 Nixon-Agnew election campaign in the United States.
A Senate investigation to discover if this was CIA money finding its way back home, was abruptly cancelled at the direct request of Henry Kissinger. "
Thomas Countryman 'NSA/CIA liaison in Athens'