>This is erasing recently disgraced people from photos in order to misrepresent facts.
Which has been done since forever. People in the past didn't erase others only after they were long gone. Someone could quickly fall out of favor and have many of his depiction and documents already altered in a single year.
I don't think it's something that has always been universally common. Erasing people like that is something that mostly the Soviet Union was known for. And possibly China or other dictatorships, but it's something you mostly see in propaganda from dictatorships. It's quite unusual to see it from the UK.
My problem is with people using nazis and communists for cheap rethoric effect towards people who don't know history and eat it all up. If you knew that people have been erased since the time of the babylonians you wouldn't immediately compared what's happened to nazi Germany.
It's bad that he got deleted from the photo, but that's not indicative of any particular 20th century dictatorship