It is somewhat unfortunate that this isn't in the guidelines, but it is a natural tendency and would be impossible to try to clean up by enforcement. Eventually, you will get used to the general group mentality. Some things can be said in a very few words and will be understood and accepted because they follow the way that most of us think. Other things have to be laid out logically so that a debate on your thinking can follow.
In defense of the site though, your initial downmodded comment was rather condescending and showed a lack of knowledge of the area. Responding to someones idea with "Huh? You really think that?" isn't very respectful and it shows a certain amount of arrogance. Arrogance is frowned upon pretty heavily here. It doesn't add anything to the discussion when you are correct and is just plain obnoxious when you are wrong. Be humble about what you know, ask questions about what you don't, and provide logical arguments for what you think. That's a big part of what sets this site apart from a lot of the other sites like it.
In defense of the site though, your initial downmodded comment was rather condescending and showed a lack of knowledge of the area. Responding to someones idea with "Huh? You really think that?" isn't very respectful and it shows a certain amount of arrogance. Arrogance is frowned upon pretty heavily here. It doesn't add anything to the discussion when you are correct and is just plain obnoxious when you are wrong. Be humble about what you know, ask questions about what you don't, and provide logical arguments for what you think. That's a big part of what sets this site apart from a lot of the other sites like it.