White exceptionalism - The nuance here is the issue of feeling like "I am done, no more worries about leveraging my white privilege." Which in un-to itself would be an example of privilege exhibition. I personally feel like I am making a positive move towards understanding my whiteness but completely comprehend it is a life long journey.
Guilt/Shame - From the get-go, I concede that I am coming from a standpoint of the Thinking area of the Cultural Compass, Pacific Education Groups copyright model, in this portion of the response. As a philosopher by training, I see the ethical logistics natively embedded in this discussion. Guilt and shame, for me, cannot be boiled down to a utilitarian, altruism, or an egoist perspective. What is really being broached here is the motivation behind someone's efforts to stand against racism. It highlights the dichotomy of altruism vs egoist ethics, which no one can never accurately pinpoint motivation with the exception of the individual person committing the action. A true altruist may in fact act from a perspective of not wanting anything in return, while an egoist will say there are no true altruist acts since every person is going to get something for every act, thus feeding the ego. So while I agree with the trainings identification of asking participants to reflect on the motives of desired actions, it may not actually be addressing the possible causes of guilt and shame. Such as you are white and therefore by default the problem, as in the capacity of Christianities notion of original sin where people are inherently born into being evil and must atone throughout their lives.
Toxic white guilt - This concept would fall under the same response as above with the twist of being an extremist. You are going to be the Great White Hope to save the oppressed Black, Brown, and POC community. This is not being an ally, one of the greatest expressions I like in this training is that the message is standing in solidarity BY the oppressed community in support or inaction.