I agree that sometimes we, as a community, can get a little feral... we've been through the wringer though, so understand why we get that way.
With that being said - I also agree with GM because we are also prone to knee jerk reactions... due to the aforementioned wringer... but we shouldn't be so quick to say "Contrary Opinions automatically equate to 'shitting on the idea'."
It's a fine line to walk but critical thoughts and opinions upon these things are how we keep a proper check/balance system...
However, I am a firm believer in "it is not what you say... it is how you say it."
GM is the classic example of knee jerk action. Only difference is that his knee always jerks if someone is critical to the team. I think that is a good thing, because there is a whole lot of people that are opposite of that.