Here's an example I just came up with that isn't based on any real life situation.
Imagine there's a web forum, doesn't matter what it is a forum of. On that forum there is a person, we will call this person BBE. BBE makes an offensive post. Not just disagreement kind of post, but something that can be proven to be offensive, something universal along the lines of "anybody that doesn't like raw red meat is a baby". Another person takes the time to point out that what BBE just said is offensive. BBE, instead of recognizing that categorically calling a large group of people babies is probably not a good thing, works even harder. Anyone that doesn't like to kill their own meat before they eat it is a baby, and other such things. BBE is eventually ignored of the rude statements because it becomes apparent that no amount of logic will convince BBE that what he is saying is absolutely wrong.
We move along and encounter yet another thread. BBE has once again said something wrong, except this time what he has said was so wrong that many people are in on it. He's changing his position randomly, editing posts, completely misunderstanding simple statements and making a mess of his own points. The other users, seeing that his posts are making less and less sense with ever passing moment, begin to question BBE's intelligence and sanity. BBE takes these questions as a direct attack.
So, we come to the point: BBE has done some things, acted in a certain way, that resulted in these so-called "attacks". If BBE had actually behaved with respect and taken the time to understand the debate that was going on before getting involved then none of them would have happened. Is BBE responsible for the attacks directed at himself?