I would agree with your comment except that seiji used the derogatory term, "brainwash," to refer to an activity that shawn-butler clearly chose to participate

I would agree with your comment except that seiji used the derogatory term, "brainwash," to refer to an activity that shawn-butler clearly chose to participate in. This frames the conversation in a very negative light (it was quite unnecessary), and it's not surprising that shawn-butler's response was not entirely positive. I thought the reply showed appropriate restraint.