I admittedly do not read all of Luke's posts, but if someone posts something to me that truly bothers me, then either I need it or ignore it, not keep whining about it. And that is what this appears to be- at least to me.
I think what Amy is pointing out, is that Luke continually talks down to others. Phrases like "You're wrong" come across as attacking and if HE is "right." That is attacking the PERSON, not the position. Why can't Luke just say, "I disagree, and here is why" without making everything personal? Telling people they are wrong is arrogance and people do not appreciate that approach. Amy is not the only one to notice this.
I don't care how "right" someone thinks they are, if they can't be "right" without making others feel stupid or "in darkness" I'm not going to listen to a word they say.