The AHA has specifically put out a statement[0] about monuments. The prime quote:
> To remove a monument, or to change the name of a school or street, is not to erase history, but rather to alter or call attention to a previous interpretation of history.
Thucydides, arguably the very first historian ever, criticized statues and monuments as poor representations of history. It is important to understand the difference between history and historical memory. Monuments are not pedagogy tools. Actual professional historians do not see them as relevant for teaching us about the people they represent.
[0] https://www.historians.org/news-and-advocacy/aha-advocacy/ah...
I think that framing minimizes the extent to which we can and do choose how we portray history in order to choose how we see ourselves.
Part of doing this well is being able to isolate properly, identifying what made historical figures exceptional, and being able to forgive sins which are considered sinful now, but were common behavior in the past. If you can't do that, you can't preserve people as symbols of principles at all, because the morality of the moment is not guaranteed to be held forever.
https://www.washingtonpost.com/outlook/2020/06/19/destroying...
It feels tired to still be repeating this when so many others have said it, but Germany is capable of learning about Hitler and Nazism without the monuments glorifying it; Americans can learn about Robert E. Lee without the whitewashed monuments everywhere. And anyway, there was none of this clutching of pearls about history-erasure when the Saddam Hussein statue was toppled in Baghdad in 2003.
You could say then that these specific idols are not good idols because of the realities of their actions in the past. But there are other perspectives [0] that should be considered before taking that as a foregone conclusion - a conclusion mostly adopted from peers and not study.
[0] https://bit.ly/2NN8Wbv