People should be aware that the concept of racism did not really exist until the late 70s and did not become mainstream until much later. It is utterly meaningless to hold historical figures to standards that they were not even aware of
Actually racism, in one form or another e.g. discrimination towards specific ethnic communities, was under debate for a long time prior to the 70s, it has been written about in a recognisable form since Victorian times, and in the early 20th century in the US. Anti-semitism as a form of racism also discussed widely early on in the 20th century – including in essays by Orwell. More formal recognition of racism and racial discrimination is contained in the 1963 Race Relations Act but this is not evidence that it was not an issue beforehand!
www.npr.org/sections/codeswitch/2014/01/05/260006815/the-ugly-fascinating-history-of-the-word-racism?t=1591818069297
www.researchgate.net/publication/263211523_Victorian_%27Anti-racism%27_and_Feminism_in_Britain
www.irishtimes.com/culture/books/the-british-empire-s-hidden-history-is-one-of-resistance-not-pride-1.3169778
As for Churchill he was subject to extensive criticism in his own time, before he became Churchill the myth!
And again as quoting from sources like The Guardian seems to bother some people on this thread, here is an external source and a decidedly non-leftwing source!
Leopold Amery, Churchill's own Secretary of State for India, likened his boss's understanding of India's problems to King George III's apathy for the Americas. Amery vented in his private diaries, writing "on the subject of India, Winston is not quite sane" and that he didn't "see much difference between [Churchill's] outlook and Hitler's."
www.washingtonpost.com/news/worldviews/wp/2015/02/03/the-dark-side-of-winston-churchills-legacy-no-one-should-forget/
Nor was Churchill universally popular with the voters. Here is Harold Nicolson, man of letters and National Labour MP, writing in his diary on 7th February 1944:
“I fear that Winston has become a liability now rather than an asset. This makes me sick with human nature. Once the open sea is reached we forget how we clung to the pilot in the storm. Poor Winston who is so sensitive although so pugnacious will feel all this. In the station lavatory at Blackheath last week I found scrawled up ‘Winston Churchill is a bastard’. I pointed this out to the Wing Commander who was with me. ‘Yes,’ he said, ‘the tide has turned. We find it everywhere.’ ‘But how foul,’ I said, ‘How bloody foul!’ ‘Well you see, if I may say so, the men hate politicians.’ Winston a politician! Good God!!!”
The Wing Commander was right. The tide had turned against Churchill and in 1945 the people threw him out.
So we should refrain from implying that some glorious state of unity existed during the war. Churchill’s critics were able to draw up a long charge sheet against him, dating back to Tonypandy and Gallipoli.
www.conservativehome.com/thetorydiary/2020/03/the-second-world-war-did-not-see-criticism-of-the-pm-suspended-nor-should-this-crisis.html
www.telegraph.co.uk/history/britain-at-war/10255153/Winston-Churchills-speeches-were-overrated-and-some-went-down-badly.html