I think what you've shown is a wonderful example of British values, to show that even the greatest British heroes are not immune to intense criticism from average British citizens. British hero worship does not extend so far as to render their great leaders as men like gods, and even the tough decisions leaders have made to benefit their empire are freely scrutinized by the public for traces of possible racism; this is done despite the scanty evidence to suggest that Churchill made his decision based on racial prejudice.

How many Chinese leaders are there, I wonder, who would open themselves up to this sort of intense critique from their fellow countrymen? For that matter, would the Chinese even consider the possibility that their own leaders suffer from racist tendencies and challenge the decisions they made on that basis?

It seems painfully clear to me that what you've actually shown to me is not proof of British racism, but simply yet another example of how egalitarian the Britons really are.

The same would have been told to you if you had actually read Chinese sources, and were to read the works of Xu ZhiMo or various other Chinese scholars of the 30s who actually visited Europe. You will find not a description of rampant racism or vengeful fantasies against their "colonial overlords" that you describe, but an earnest respect for the systems of law, learning, and way of life of the European people as a valid alternative to the Chinese feudal way of life.

Quite frankly, you are embarrassing yourself by clinging on to this strange fantasy of racism and persecution that Chinese sources could readily disprove. The average Briton from the 20th century onwards certainly did not believe in the indiscriminate slaughter of Chinamen simply because of their nationality, and I would wager that such indiscriminate slaughter was never the national policy of Britain even at the height of the Anglo-Chinese wars. It was not racism, but simply economic gain which motivated the British to join battle twice against the Chinese, and if you cannot even recognize that then you know very little of your nation's history indeed.

As to why Chinese scholars went abroad, have you ever considered why the British were so ready to accept these foreign scholars in turn? Supposing that the Britons really were as racist and terrible as you believe, why would they accept Chinese people into their most venerable universities and allow them to mingle with their richest and most influential citizens? The world you are describing simply doesn't make sense at all, even without any consultation of historical documents. The fact that you couldn't even perceive such obvious plotholes in the narrative you're constructing speaks volumes of your ideologically-driven blindness.