How they try to explain it.

Check this link from Jerusalem post on how jubama became a ju.

http://pqasb.pqarchiver.com/jpost/access/1587948401.html?dids=1587948401:1587948401&FMT=ABS&FMTS=ABS:FT&date=Oct+30%2C+2008&author=HILARY+LEILA+KRIEGER&pub=Jerusalem+Post&edition=&startpage=13&desc=The+Obama+family+rabbi

Is it plausible??