I don't think it's a change; I would say it's more of a stylistic issue. I remember it was used in a very small column. I don't think there's a lot of meaning behind the difference. “Iranophobia” has been used by some, I believe by one scholar, and it has been used before. I'm not married to it—we can change it to “anti-Iranian sentiment” if that helps.
On October 25th, 2017. See this statement in context.