Hamas did not exist at that time, but Hezbollah did. Also the PLO was big in the 80's. And yes, Reagan knew who all of the major players were.
That was my point. Reagan knew who all the players were in 1980. He wasn’t a swami, so he would not know who the players were after he was dead. By the way, Hezbollah did not exist in 1980 either. It came into being after the 1982 Israeli invasion of Lebanon.