Well that's an uncommon mix to be half middle eastern but I'm sure people don't mean to offend you.If you want to you can clarify it or just let them assume.
Apparently I look African but people never say that unless they kind of know me or are trying to.Total strangers don't just walk up and say that so I'm glad I don't have to clarify.That I know of I'm not really since I'm not sure of my ancestory it dates very far back as many Americans.If its a friend or I have the time I say no I'm not I'm American Black my mom is from South America but she's Black.Otherwise I just say no I'm American that's it! But if the person that asks is African I don't get offended because I understand he/she thought they saw someone they can relate to.