Why not re-write all history books in the name of today's political correctness? If we don't like something just erase it.
It appears to be a valid question, in that slippery slope is not always a fallacy.
I don't think there's really a right and wrong here, it's just the fashion of the times. Who knows who will be rehabilitated 100 years from now and who will be stricken from the monuments :-)