Do you find this drag queen's (a white guy) character offensive and his humor offensive?

Shirley Q Liquor is a (white guy) drag queen who dresses up a Shirley Q Liquor (an African American woman).

More on Shirley Q:

Shirley Q. Liquor, known off-stage as Charles Knipp, is no stranger to controversy. Knipp saw an opportunity to express his satirical nature as the drag persona Shirley Q. Liquor, developing a series of live one-man shows and CD’s. Knipp and his Shirley Q. fan base see his work as comedic satire. Others take offense over the basis of Knipp’s expression. The issue? Knipp is a Caucasian man that performs in full blackface as an impoverished African-American woman living in the southern part of the U.S. named Shirley Q. Liquor. Is Knipp’s satire racist or within the bounds of comedic license?