"Countries" don't have beliefs. People have beliefs, and it seems to me that the belief that women are second class citizens could be overcome by exposing those who hold those beliefs to a female head of state who works with them, instead of bombing the shit out of them.

I think it's fair to say that Germany is Iran's closest western ally, and I don't think Angela Merkel has caused any change in Iran's diplomatic posture simply because she's a woman. Ultimately, both sides of any diplomatic relation want what's best for them. They don't care if it's a man, woman, or a robot on the other side of the table.