From where I'm sitting, The Ibanezer Scrooge is correct about the historical 'construction' of whiteness in an American context, and RDKirk is correct about how these terms and concepts are used and sometimes 'weaponized' today outside of their original (primarily academic) contexts. Given that, I don't know why this thread is breaking down as though you're either on the side of the course or against the course. It seems like a lot of courses are, where some of it is good information you might not learn about otherwise, while other content is ideological chickenfeed, and the two are definitely not clearly delineated as such. This is where it helps the student to have a strong internal sense of their own values and who they are, because it is rare that this kind of course will pass without something being offensive and challenging to whatever viewpoints they held before taking it. Heck, in my own experience in graduate school, I took a course on Sociolinguistics that ended up greatly offending me, due to the Jewish professor's constant mocking of Christianity and associating it with racism and colonialism. It took people from my Church, who are native African people (and at least 'brown', by American standards), to thankfully take me to task by reminding me that plenty of Christian churches have been racist and associated with colonialism (e.g., Lutheranism did not become the dominant church in the German colonial possession of Namibia by coincidence), so she's not wrong, and anyway it's not like she's saying the Coptic Orthodox Church specifically did any of that. Following their strong rebuke of my entitled whining, I apologized to the professor in question (we had had a very intense disagreement over what I had insisted to her via e-mai was a racist and completely off-topic assignment), because I realized that while she was painting with an overly broad brush in her very sophomoric criticism of Christianity, I was also in the wrong for reacting as though because she had said "Christian", she was talking about me. (cf. this course says whiteness is a problem, I'm white, therefore XYZ.)
This stuff is part of the college experience, and since it's not like college is the only time that students will ever be challenged or offended, it can at least be argued that a secondary effect of taking such as course as written about in the OP could be (perhaps unintentionally) teaching students who probably haven't been exposed to much challenging of their views how to properly handle it. Does that "excuse racism", as the OP has subsequently asked? Heck no, it doesn't. But it does provide a relatively 'safe space' (ha) to discuss aspects of racism in Americans' everyday conceptualization of the world, as well as to identify when academics are being manipulative and pushing nonsense ideas on students/society at large.