Yes we know, his Mama was a Jew and his father was a Indian mongoloid reservationist.When Marty was growing up he tried to be a Jew and got it half way right. He smelled terrible just like a Jew but couldn't get his hair to curl on the sides like a Hesidic Jew, so the Jews asked him to disassociate himslef and practice being a Jew elsewhere. Marty spent endless years trying to find a Jew clan that would accept him and was turned down by all of them. Finally he follwoed his fathers routes and became an Indian Mongoloid reservationist. He then opend up a small village that consisted of teepees made of little boys underpants and went into business with Pete Rowe building elan-bots.