Why should someone have the right of return to a place his or her ancestors never lived in? That is absurd! Anyone could insincerely convert to Orthodox Judaism and say "I have a right of return to Israel!" It is as crazy as me saying I am a converted Hindu and am telling the government of India I have the right to permanently settle India now despite having no ancestors who ever lived there! No government other than Israel would allow such a thing to occur. They'd say that's insanity and would have me deported to where I came from. 

Sometimes governments allow professionals, big business owners and investors to live in their lands if they will contribute their talents and invest in their country but otherwise countries don't normally do favors to individuals unless there is a refugee situation that is out of control.