Applying the tastes, culture, transient sentiment and temporal judgement of one era to another is bigotry.
Yep.
Churchill was also criticized by his own people, who fought the Germans on some of his conduct. He was instrumental in the British war effort, but he also called for or ignored some atrocities - during the war in pushing the Bengal famine (basically taking the food from starving people) and post that in Africa (which I don’t know much about so not going to talk about them).