What connects these five people?

Cleo A. Noel Jr., in Sudan, 1973

Rodger P. Davies, in Cyprus, 1974

Francis E. Meloy Jr., in Lebanon, 1976

Adolph Dubs, in Afghanistan, 1979

Christopher Stevens, in Libya, 2012

The answer according to New English Review is as follows:
'Four of the five were killed either at the hands of frenzied Muslim mobs or, as in the case of Ambassador Cleo Noel, by the express order   from a Muslim Arab terrorist leader: the man who ordered Noel's murder was Yassir Arafat.

Davies was killed by a sniper during a demonstration outside the embassy by Greek Cypriots. Who that sniper was, and whether he was a Cypriot or possibly an Arab -- Cyprus is a known center for Arab intrigue, including plots against Israelis and Americans -- is not known to the public. If the State Department knows, or strongly suspects, it is not telling. Of course, the American government has still refused to release the record of Arafat's message to Khartoum giving the go-ahead for the killing of Cleo Noel.'