The long serving foreign minister of Russia recently said that Hitler probably had jewish ancestry. I doubt anyone knows for sure. That theory has been out there for a long time. Is it possible? Sure, why not. There's plenty of pictures of Hitler making the "M" handsign. Some people believe it means "mason", some believe it means a person is really a crypto "jew", which is really extremely similar to being a mason, by the way and vice versa.
History regards Hitler as uniquely evil because of the concentration camp story. The concentration camp started with the evil British Empire and its merchant wars against dutch settlers in South Africa. It used women and children to "win" a war to get monopolies on gold and diamond mines for some homosexual businessmen. This sounds completely insane as a description, but is merely a terse recitation of the available facts.
The US put Japanese, German, and Italian families in concentration camps during WW2. It seems extremely likely that the unfortunate people who died in german concentration camps died of huger and disease because of the failure of germany in the war, rather than through some mass extermination program, which seems like post war propaganda and makes no sense. The concentration camps were evil, and detaining jews there was just as evil as detaining Japanese people in US concentration camps.
Hitler sucked. He caused the slaughter of millions of germans and slavs and destroyed Germany and made it a vassal of the USA and England. WW2 led directly to the creation of Israel.
Does it mean anything if Hitler is a jew? No. There's not some unique brotherly solidarity among jews or any other group. Did anything good come out of WW2. No. WW1 and WW2 marched people of the world toward a giant prison camp. The barbed wire is just starting to get more obvious now.
I think there's zero truth to be had in the stories of "official" history. That said, I don't think you can ever really know what happened with any certainty as an outsider. It's all just speculation, except for the people who were really there in the rooms where plans were discussed candidly by "leaders". Even historians who meticulously compile documentary evidence of this or that event have no clue--it's really just another form of speculation that's not really better informed than wild eyed "conspiracy theories".
Why did Sergey Lavrov make that statement about Hitler? It makes no sense, really. He's a very polished, intelligent public figure. I doubt he makes any statement in public without a calculated reason. There's no obvious overt reason to bring up the Hitler was a Jew meme in his public, official capacity.
I think whipping up tropes that jews believe are anti-semitic helps reinforce the anti-semitism cunard. There's a (former) youtuber brother Nathaniel who pretends to be a Russian orthodox christian. He's an actor. He basically recites the historical charges against jews over and over again even though he is the most obviously jewish person on the planet. I think it's likely that his paid job is to recite those charges to keep them in the public consciousness. It helps keep the "anti-semitism" idea alive, and keeps normie white people afraid of being labelled "anti-semite".
According to this theory, Lavrov is just another puppet on the world stage. So Russia is too. They're just playing a game to slaughter more millions of people.