There were many actions against not just Turkish Cypriots but Greek Cypriots by people that were theoretically responsible to the RoC. And I am not just talking about 1974 but the years before. Sampson didn't appear out of nowhere. Was it only in 1974 he act agaiinst national interest and can be classed as a 'traitor' or do you consider his actins in 1963-4 as the actions of a 'traitor?'.
I searched Google for "Samson" and "1963", but I couldn't find any information. So I can't comment on the specific question.
In any case, the president was Makarios, and everybody had to follow the direction that he wanted. I am not saying that Makarios never did mistakes and can not be judged. What I am saying is that people elected him, and therefore he was the one who was supposed to control everything and take the decisions and not anybody else.