Ex-astronaut Scott Kelly tweeted out a call for civility in these divisive times on Sunday — and naturally got eaten alive.

His comment: “One of the greatest leaders of modern times, Sir Winston Churchill said, in victory, magnanimity. I guess those days are over.”

We assume he was slapping celebrations of Brett Kavanaugh’s confirmation, especially posts with the #BeersForBrett hashtag.

But his critics just saw red at the name Churchill. Yes, the prime minister who rallied Great Britain in the darkest days of World War II and led his nation to victory over Adolf Hitler’s Nazi Germany.

But he was also an imperialist and even a colonialist. That was enough for some to equate him with Hitler, while another tweeter blamed him for the 1943 Bengal Famine. (Churchill sent food to troops fighting in Greece, rather than to India.)

Kelly couldn’t just tell them to get real: His territory is now left-of-center. As UN ambassador for space, he’s tweeted on the horrors of President Trump pulling out of the Paris Accord and setting up a Space Force.

So he surrendered, tweeting: “Did not mean to offend by quoting Churchill. My apologies. I will go and educate myself further on his atrocities, racist views which I do not support.”

It’s a sad state of affairs indeed when you have to volunteer for re-education for quoting one of the greatest leaders of the last century making a perfectly fine point. But them’s the rules on the left these days.