Well, Djawadi was born and raised in Germany, speaks fluently German and has the German citizenship, so I would qualify that as him being “fully” German. 🙂
Yes, his father is Iranian, but I don’t even think Djawadi speaks Farsi. Not even sure whether he has the Iranian citizenship? (If he had, which could be, though I never saw it mentioned, I would consider him “fully” German and “fully” Iranian though. 🙂 ).