And what if I told you that tearing down statues is done by the Victors not the losers. The Losers have had no particular right to remove statues in History and in the case you refer should not have done so.
You see it's like the spoils of war. In the case of the removal to which you refer it's more akin to vandalism. As the rioters (not protesters they're peaceful right?) do not have authority or mandate to remove the statue by any legal means or authority.
They could be civil and go through a process to remove statue but they are not actually interested in removing the statue for it's claimed offence that is just the story they told the useful idiots. They only want them removed as part of their Marxist ideologies being fulfilled.
As to your Rumsfeld quote, you use this out of context to the situation in present day America.