Insane. I’m no anglophile, but this is just crap.
I’m no fan of Britain, but they left their colonies in better shape for independence/self-rule than other colonizers. Their former colonies are a mess, but generally avoided the total chaos and mass murder seen in the former colonies of Belgium (Congo), France (Indochina), or Portugal (Angola/Mozambique). Britain had integrated more of their colonized people into the administration of the colonies, so they could have some chance of governing themselves.
The rest in the article is also exaggerated, but note a grain, grain of truth.
Churchill WAS racist - no doubt, he hated non-English - whether "white" or "brown" or "black", but he never advocated a "final solution"
Churchill was RESPONSIBLE for the fall of the british empire - his obstructionist policies in the 20s and 30s prevented making India a Dominion like Canada or Australia. If they had done that, then India would be similar to Australia.