Of course, if there are larger issues/conflict with that particular teammate, you should absolutely escalate to higher ups and HR as appropriate. My perspective on this tip is meant to avoid generating negative feelings around code reviews by making it about the code and not the individual. Obviously if those feelings exist, there's a larger problem to be addressed first. :)
Sorry, I didn't mean to imply there's anything wrong with the tip at all. It's spot on. I meant only to add to it, to cover the uncommon case where it truly is a problem with the person.
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