Yeah, whatever.You're asking for them to be politicians. One of the biggest complaints about politicians is that they don't call people on their shit and give droning PR responses.
Don't use that argument because it's a catch 22. It's a letter to the editor column. They're supposed to print letters, good and bad. If they don't print letters that reflect an accurate cross section of the readership (in this case the Comic Book Guy caricature) then the entire section is worthless. You keep acting like this was an isolated incident. I'm telling you the sentiment was common. In order to publicly dismiss the sentiment they have to print a letter reflecting it.
You and I have different ideas of what constitutes "dismissal" because that statement of yours says nothing of the sort. What it says is "You might be right but we also might be. Your opinion is equally valid, though." What the response is meant to convey is "your opinion is stupid because you haven't rationally thought it through." How do you respectfully tell somebody they're irrational and not worth listening to?
And don't say "they shouldn't have printed the letter then if they wanted to say that" because that goes back to the catch 22. Then they get slammed for only printing letters that are praiseworthy.
In case you can't tell, I really don't like PR nonsense. Say what you mean and mean what you say. If somebody is being irrational, call them irrational. Don't tell them "we respect your opinion" when you really don't. That's deceptive and disingenuous.