It doesn't matter to me. Rocko commented that he wasn't white. Somebody infered that the altercation between Issa and Waxman was racist. I don't understand how an altercation between two guys of the same race can be viewed as one or the other being racist.
When speaking technically you're both right and wrong. Defining race has nothing to do with skin tone, but Issa technically is a Caucasian because he is an Arab. So his ethnicity is Arab. Many would refer to hate or mistreatment of Arabs by another group, based on the Arab ethnicity as racist, similarly with Hispanics we see this applied. So racist isn't the technically correct term, but it is applied to certain cases involving hate or discrimination based on ethnicity.
That would make Issa a semitic caucasoid (member of Semitic-speaking people: a member of a Semitic-speaking people of Southwest Asia, including the Arab and Jewish peoples, and the ancient Assyrians, Babylonians, Carthaginians, Ethiopians, and Phoenicians).
Ya, you are describing the Levant I think. Genetic studies have kind of settled the question. Phoenicians weren't Arab and a bunch of Lebanese can trace themselves back to the Phoenicians with mixtures of the other ethnicities you mention in your post. But Issa also has his mothers genetics, which makes him half German and Czech.