I am sorry to be the one to tell you this, but it is you that lives in a fantasy. Genetics testing (I know, science is difficult for some people to comprehend) has over and over again shown that Jews from around the world descend from the Israelites with some other admixture due to conversion, intermarriage, rape, adoption, etc. I myself am half Sephardic and half Ashkenazi and I can tell you that some of my siblings look very Middle Eastern while some of my siblings look very European. This just goes to show that even people with the same EXACT genetic lineage can vary greatly in their appearance. Imagine how different people can look after being separated for 2000 years!
One student killed, three wounded at Arizona campus during fight (a)
from the article: Indian Jews from 'lost tribe' of Bnei Menashe arrive in Israel