The entire British Empire was racist. The whole concept was racist. Churchill wanted to keep the empire. Of course he was racist. As was Rudyard Kiplling, and Her Majesty the Empress of India, and.....everyone. There may have been a very small handful of non-racists born in 19th century Britain, but it was a very small number indeed, and that goes for most people born in the first half of the 20th century as well.
Apparently, there was an explosion of virtue during the post war period, and the people born then were virtuous, good, and wholesome people, while all the people before them were rotten to the core. Maybe there was a fortuitous mutation that spread through the population increasing the virtuous behavior.
We should tear down all the statues of anyone born before 1950, prior to the onset of virtue in the population. That goes for America as well. That Lincoln fellow, on the pennies? That dude was one serious racist.