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 === Who, What, Why === 
 Interesting that this was dragged in here by , a fixture on Wikipedia's ANI Noticeboard, where he often shows up to back up editors engaged in edit-warring to promote anti-Israel viewpoints. 
 That old standby  Hitler as part-Jew  is a staple among conspiracy theorists, neo-Nazis and just plain nutters obsessed with race, who would relish nothing more than the ""cosmic irony"" of Europe's Jews having been murdered by ""one of their own"". 
 One wonders why he sources the ""news"" to Ha'aretz, an Israeli newspaper. It is a favorite ploy of a certain element to highlight Israeli or Jewish sources, when available, to buttress a point and to be able to say, ""Look! They themselves are saying it."" In fact, the ""story"" was broken by Belgium's Knack.be more than a week earlier (Link), and picked up a week later by semi-respectable papers such as Britain's Daily Mail (Link). 

 If one were to take the reported findings at face value, then Hitler had Berber North African ancestry much more than Jewish ancestry. ""Haplogroep E1b1b komt het frequentst voor bij de Berbers en daarnaast ook in Somalië (> 80%). Opvallender nog is dat de haplogroep van Hitler de tweede vaakst voorkomende haplogroep is bij de Asjkenazische Joden."" [My translation: Haplogroup E1b1b is found most frequently among the Berber people and slightly less often in Somalia (prevalence more than 80%). Even more stunning is the fact that Hitler's haplogroup is the second most prevalent group among Ashkenazi Jews.] 
 The Daily Mail, if it is to be believed (always a chancy proposition) writes that E1b1b ""accounts for approximately 18 to 20 per cent of Ashkenazi and 8.6 per cent to 30 per cent of Sephardic Y-chromosomes"", which would be a much lower prevalence than among Berbers or Somalis. (And please note, according to the Knack.be article Eb1b1b is found in 25% of Greeks and Sicilians.) 

 Population genetics is a complex subject. Raw data can only be evaluated by experts  real scientists. The supposed ""findings"" would have to be replicated and confirmed by scientists, in a peer-reviewed paper. How likely is that to happen? Well, according to the Daily Mail, DNA was obtained from ""American Alexander Stuart-Houston, 61, a grand-nephew of Hitler. He was trailed for seven days before he dropped a used [napkin] which Mulders said led him to the cousin in Austria."" 

 In other words, the ""researchers"" used highly unethical methods (that would never be used by real scientists) to obtain their supposed data. These ""findings"" will never be replicated by self-respecting researchers. The story will subside into obscurity and become another addition to the steadily growing staple of conspiracist lore, popping up in the usual places like rense.com. 

 The nutters pushing this ""breaking news"" today will be found next week defending the Khazar converts theory, according to which Ashkenazi Jews have no connection with the Middle East but are descendants of a Turkic people that converted to Judaism in the Middle Ages. 

 Just another day on the Wikipedia, the world's foremost crank magnet.  "