Isn't the editor being rude, at best? I mean, I'm not that quick to take offense but can't see how this guy's arguments are logical, beyond being evidence of some kind of xenophobia or ignorance. With regards to his latest comment, what does Malta's size have to do with the inclusion of an article about its historical nobility? And what about this earlier comment, and I quote: ...the whole reason a Royal Commission was appointed in the first place to sort out Maltese titles was because a whole whopping lot of people demanded recognition of this title and that purportedly granted to some ancestor or another by the crowned head of some ephemeral state or another. It'd also be interesting to know why the British bothered at all, instead of dismissing the whole business as gimcrackery from a tiny island with a contemporaneous population similar to Southwark, which would have been consistent behavior from them. 
These comments are insulting on every level; these are not polite things to say, especially from somebody who obviously has no idea what they are talking about. And yes, I have taken these comments somewhat to heart because of an intimate connection with the subject matter. But this doesn't diminish the fact that this editor's behaviour is, in my opinion, inappropriate.