You just got to love it.

The US says it will not deport him to any country that would hand him over to Mr Castro's regime in Cuba.

Venezuela said on Wednesday it would not hand Mr Posada Carriles over, and Mr Castro said he would be happy to see the Cuban exile tried in Venezuela.
Basically it means that he cant be tried by the country against which he committed the acts of terrorisim. Be like captureing Bin laden then having him tried by IRAN or by the talibans.

Venezuela said the US would be guilty of double standards if it sheltered a man accused of terrorism while claiming to fight a war on terror.
"It would be condemned around the world," Vice President Jose Vicente Rangel said.
"It seems that for some there is a good terrorism and a bad terrorism."
I guess that sums it up he was a good terrorist. All those people on that plane were bad communist cubain type people so it was more or less alright to bomb the plane.

here is the full source : source