While I agree with the students who are pointing out that what the professor did WAS in fact a blackface performance (a 2016 version if you will) I do not at all believe it would be productive to remove Professor Schurtz from her teaching position although some disciplinary action by her department does seem appropriate given that she invited students over whom she has academic power (if not grading power) to her home to witness her performance. 
It is patronizing in a racist society like ours for a white woman to put an afro-wig on her head, paint her hands and face black in order to imitate an African-American to demonstrate her reaction to his memoir about racism. If she read a moving memoir about a Standing Rock Sioux Indian would she have donned a feathered headdress and "war paint"? You know Gary all the people that are your age in my family don't really get it either. Remember, I don't think she should be fired but she deserves to be ridiculed. What she did was ridiculous.