Actually, given that's Brian's already admitted that his actions were indefensible, I think the phrase you're suggesting is redundant. And while his actions were indefensible (which he admits and which I think we all agree on), some of the responses to his behavior were pretty horrid too.

I read this as indicating a continuing level of discomfort on his part with some people. Of course, I have the benefit of twenty-odd years of experience with him, so it may be the language is unclear and I don't see it.