I'd hardly say that it's rooted in nothing. Several people were actually able to intelligently disagree with it, after all. In an increasingly global world these kind of issues will become more and more important to deal with and I would think disagreeing would be more appropriate than dismissing in this case.
Besides, if you really think it's better not to respond then not responding would seem better than just displaying some kind of mob behaviour by quoting a post that had no content to begin with. At least in my opinion.
If you read my post correctly, I just stated why the responses were like they were and that some people shouldn't have responded, I didn't attack the OP. That aside, I do think that it's incorrect to assert that Christianity is more attacked than Islam.