The article is using a racialist argument (He had non-White DNA) to attempt to discredit racialism. What's non-White DNA? Isn't race just skin color? This is a typical tactic, you see articles that say "Race is a social construct, ethnic groups are biologically identical" and then you see other articles stating, "Mixed race people are genetically healthier, smarter, and taller," so on and so forth. In other words, playing both sides of it.
Make no mistake the real purpose is to discredit his ideology, the people writing these articles couldn't care less about Hitler's genetic profile, it's his ideology they're trying to discredit. The ideology of having a Government that represents it's people. IE American foreign policy represents America rather than Israel. American immigration policy represents America rather than Mexico. America's economic policies and monetary system represent America's people rather than big banks and guys with names like Greenspan, Bernanke, and Blankfein. They couldn't care less about Hitler's genes, it's just a means to an end.
Of course, the ideology they're discrediting (Kill everyone who doesn't have blonde hair, exterminate all the Blacks, everyone in the world should be German) wasn't his real ideology in the first place, so that's a lie too.
They claim he was this maniac who wanted everyone in the world to be 100% White, and then they're saying, "Well he himself was only 99% White" thus his own ideology discredits itself, and that's the real intention here. It's like setting up a strawman and then knocking it down. But both the strawman and the toppling of the strawman are lies.
A) Hitler didn't want to eliminate Jews, he wanted them out of his borders because he viewed them as a powerful influence that was working contrary to the interests of the German people.
Hitler granted many people of mixed German/Jewish ancestry citizenship with a few restrictions (no working for newspapers or Government). If he was a mass murdering maniac why would he let people who were part Jewish live their lives? It's completely contradictory.
B) There's absolutely no evidence Hitler wanted to eliminate Black African people. Yes he viewed them as being more impulsive and having lower intelligence. Guess what, so do most of the almost 7 billion Human beings on planet Earth. If that were a crime mankind would all be jailbirds, including most of the people living in Israel. Israel maintains some of the harshest most racist immigration policies in the world. You have to have Jewish ancestry to get in there, even if you're married to a Jewish spouse it's difficult to get through all the red-tape, take it from Alex Jones.
C) I don't have any compelling reason to believe this "study," since the whole article is dripping with preconceived bias (Race doesn't exist, Whites are evil, Jews are great, Hitler was Black, the world is flat).
D) Even if the study is hypothetically true, having this genetic material would not make Hitler a Jewish man or a Black man.