Don't cry "reverse racism" or make false equivalencies. Context matters. Saying whiteface is the same as blackface trivializes historical oppression (hello, black folks were not the slave owners/lynchers/Jim Crow enforcers). People of color are forced to assimilate themselves to the mainstream white culture in order to survive; putting on a "white face" is something we must do every day.  When a white person dons black face, they are trying on the face of the marginalized other for fun without living or experiencing racism. Not to mention the historical context of blackface. Google it.