PARIS — Six years ago, I went to listen to a man, whom I will not name, in a café in Paris. He said it had been 24 years since he had been back to Iran, that he had to leave right after the revolution of 1979 for political reasons. He talked of many things, and he ended by saying: “Once you leave your homeland, you can live anywhere, but I refuse to die anywhere other than Iran — or else my life w