1. The evidence for the roots of 'Blackface' are in Minstrelsey wich was racist.
Les,
Have you forgotten the last post on this topic?
You conceded then, after reading the wikapedia article on border morris,that blacking up was much older than the minstrel shows.
You agreed that the article was inconclusive regarding the amount of influence the minstrel shows had on the matter.
The evidence you quote as far as I can see is your opinion rather than fact.