I have never met any korean nationalists who would go that far with such claims, ofc they would dispute the origin of some cultural aspects, and more than that they would make rediculous territorial claim like northeastern China should be rightly korean (in extrem case also including the coastal region of china), also japan should be destroyed and colonized by koreans. However all of them would uniformly argue that such "create-and-invent-everything" claims are made up by the Japanese (and taiwanese) without any base, the purpose of such fast spreading rumors is to ruin the korean image and sour the relationship with mainland chinese. Despite everything personally I would still trust koreans more than japanese.
I wouldnt go as far as "Nazi", just combine youth and boredom with the wish of finding pride in their own identity, you would find similiar pattern in all the eastasian groups moving rightwing(or leftwing) direction, be it japanese, korean or mongolian and even viets and other southeast asians, they would find delusion faster than any real sign of "cultural glory" from the past. There was a time when I joined such online groups as "submarine" (observation under silence). The occational discrimination against minorities are despicable, but in many cases they just got mixed up;
First the committed genocide against Han citizens by Manchurian (including Han traitors under their command) during the war between qing and ming are considered as crime of external invasion because back then Manchurian were not yet integrated into China properly.
Second the many crimes committed by Han people themselves must not be set equal with those of external invasion, and must not be used as justification for the crimes commited of invaders. In this case I do agree that self inflicted pain should not be be considered the same as pain inflicted by others, for prosecution in most law system created by human mind, without external inference those who is not insane are responsible for their own well being, and free to make decision in case of selfmade mistake against oneself. But deliberate damage made between differet parties must be subjected to lawful prosecution. It is rediculous to see japansese (and some westerners" to justify the crimes of invasion against china based on the "crimes" of communists (like chinese people who died of hunger under Maos leadership). Also in any case civil war conflicts and failure of state policy could never be the same as evil invasions between nations and world wars.
But ofc most of their views are absurd and could even be harmful for national integrity, and like any other extremist idealist groups different expressions would not be recognized, if you dont "dance in the line" there would be instant ban, thats why submarine is the best to enjoy comedy from time to time. Although that is the same case for many nationalist or "patriotic" forums, whatever origin wont matter.
That was just a joke, just like that one "French flag is white flag", you don't actually need to be that serious.
I would like to thank you first for not behaving like some of the other members here who like to call the others "stupid" and "crazy" instead of making reasonable conversation. And then, with respect, I would like to point out some of the false metaphor you have made:
You said that "back then Manchurian were not yet integrated into China properly". It's true -If only you admit that:
People of Chu: 「我蠻夷也，不與
中國之號諡。」《史記》
Southern Song: 「其地雖要為偏方，然未有偏方之氣五六百年而不發洩者，況其東通吳會，西連巴蜀，南極湖湘，北控關洛，左右伸縮，皆足以為進取之機。 今誠能開墾其地，洗濯其人，以發洩其氣而用之，使足以接關洛之氣，則可以爭衡於
中國矣，是亦形勢消長之常數也。」《宋史》
People of Wu & Shu during the Three Kingdoms：「今
中國勞力，亦吳、蜀之所願。」; 「若能以吳、越之眾與
中國抗衡，不如早與之絕。」
were also "not yet integrated into China properly".
We all know that their identity and "nationality" were no doubt "Chinese", but why would we call them "Chinese" even though Chu people clearly denied both the title of "China 中國" and "Chinese culture 中原文化". Because, back in those days, there wasn't a single ancient nation officially named themselves "China 中國". In other word, a country officially called "China 中國" didn't exist. During the past, "China" wasn't even a name of a state, but a title for the "rightful regime of the middleland 中原正統王朝" (that's why southern Song called Jin dynasty "China") or a geographical concept until Qing dynasty has given a new definition to the word "China 中國" :
「進入清代以後，雖然清朝直轄的18個省依然以「中國」稱之，而「天下」也保持著泛化的指稱政令實施範圍的含義。但「中國」卻有了指稱清朝疆域的用法， 「天下」與「中國」出現了重合的傾向。一個明顯的例證即是中俄《尼布楚條約》的簽訂。康熙二十八年，為了解決沙俄向東擴張而引發的邊界爭端，清朝和沙俄簽 訂了具有現代國際法水準的邊界條約----- 《尼布楚條約》。清朝依據《尼布楚條約》所立界碑全文為：「大清國遣大臣與鄂羅斯國議定邊界之碑：一，將由北流入黑龍江之綽爾納，即烏倫穆河，相近格爾必 齊河為界。循此河上流不毛之地，有石大興安以至於海。凡山南一帶，流入黑龍江之溪河，盡屬中國。山北一帶之溪河，盡屬鄂羅斯。一，將流入黑龍江之額爾古納 河為界，河之南岸屬於中國，河之北岸屬於鄂羅斯.......中國所有鄂羅斯之人，鄂羅斯所有中國之人，仍留不必遣還... ....」 很顯然，在條約中「清朝」和「中國」是可以互稱的，「中國」已經具有了一個近現代主權國家的含義。該條約的滿文、俄文、拉丁文本也都是如此。也就是說，最 遲到康熙時期，「中國」已經成為一個多民族統一國家的稱呼，中華各民族也由此開始以一個主權國家----- 中國的身份活動於世界舞台。」－－《「中國」與「天下」的重合》
Nowadays 中國 is obviously an official name of your country which is found by 56 Chinese ethnic groups. In other word, these 56 Chinese ethnic groups together own the history of China and the nations found by any of these ethnics in modern China were obviously ancient Chinese nations.
I know some people will argue that: "we also have Russian in our ethnic groups, doesn't that make Russia's history our history?". These kind of people clearly don't know anything about the difference between ethnic and nationality. For instance, the founders of Yuan dynasty were the ancestors of Inner Mongolian (Golden Family), not Russian Mongolian nor Outer Mongolian, therefore Russian Mongolian and Outer Mongolian have no right to claim our Yuan dynasty. Besides, the rulers of Yuan dynasty clearly claim the successor of all the ancient Chinese dynasties, from 三皇五帝 to 唐.
Moreover, Manchurian ancestors were natives of North-East China, they were subjects of Ming dynasty and Nurhachu was even an Ming officer. The war between Ming and Qing (which were both considered as Chinese dynasties) was just one of the conflicts in Chinese history, so how could "Manchurian were not yet integrated into China properly". Besides, wouldn't you think that the Chu people who denied the identity and culture of "Chinese people" committed aggressive actions to the other warrior states is also considered as "external invasion", but we all know that the people of the 7 states has later become Han people. The invasion of Qing to Ming was indeed "external", but we all know that Han and Manchurian people are both given the Chinese nationalist nowadays. It is indeed ridiculous that some Japanese try to deny the crime their ancestors have committed to Chinese people by bringing out the "crimes" of ccp (which is none of Japanese business), but I don't think you should compare this case to another case, which is about how Ming army also committed massacres to Chinese people during the Ming-Qing war. Nobody wants to deny the fact that Qing army did commit massacres to Chinese people, being fair is all the matters (since you can't blame a single ethnic for the catastrophic which was caused by several forces such as Southern Ming, Qin, Xi, Shun and Zheng Chenggong) . Not to mention Ming army did also massacre Manchurian as well.
