JimLur, possibly he's more afraid of not getting back into the USA than he is of going to Iran. Maybe not if he was a political activist in Iran, but fact is
many with green cards, and happy in the USA, will not travel until trump's mess is fixed up, because they will be afraid they won't be able to get back home.
It was Plato who said, “He, O men, is the wisest, who like Socrates, knows that his wisdom is in truth worth nothing”