Seriously. What has been the net reduction of racism since doing this?

Good point

I think the logical point here is more along the lines of going into a Jewish person's bedroom, tacking a swastika flag on the wall, and expecting them to keep it there to 'honor your German heritage'.

Are they on public property? If they are people can agitate to have them removed. If they are on private, as are many Confederate memorials, then people can agitate also, but as private property people can keep them up - unless they agreed with the desire to take them down, then as priavte people they can remove private memorials off their land. Outcry is pointless. It is not a battle of tit for tat. You won't convince me of the righteousness of your cause simply by reversing the argument, and not answering the original question by doing so.

https://en.m.wikipedia.org/wiki/Statue_of_Lenin,_Seattle
http://www.americanthinker.com/articles/2008/11/new_york_honors_che_guevara_wi.html

The statue of Che Guevara in Central Park was recently built, in fact.

Also your original comment is a false equivalence. Nobody is intruding into black people's homes and putting up Confederate symbols.

And what about statues and monuments of the presidents and founding fathers who owned slaves? Should we tear them down? Should we demolish Mt. Vernon and Monticello?