It's a case of people trying to employ the logic of "judge people who lived 200 years ago by today's standards"
If that's going to be the standard, then take down anything made by people more than 100 years ago...because times change, and I'd guarantee that nobody in those times would live up to today's social standards.
...and that's not just the case with political related stuff. It's true of a number of things.
People still pay homage to Isaac Newton in the science realm, even though he thought ingesting mercury would turn it into gold (which everyone in modern times knows is absurd), yet, it's not controversial to mention his name in a high school science class.
Aristotle thought the earth was the center of the universe...
etc...
People who were considered great men by the standard of their time wouldn't be considered great by modern day standards.
Does anyone think that Doctor from 1850 could sit at a table with modern day Doctors have anything even resembling a productive conversation about disease and medicine? If the best doctor in the world in 1850 treated people, and people applied 2020 standards to them, they'd be regarded as a quack/charlatan and probably be locked up for harming people. In fact, if there was a time machine, and we could bring prominent doctors from the 1800's to present day and show them an MRI machine, their comment would likely be "what is this witchcraft???"
That doesn't mean that a statue/museum/etc.. dedicated to Louis Pasteur is a "monument to incorrect theories about fermentation"...nor should it negate any of the positive contributions he had to medicine that were the building blocks to much better things later on.