I have two boys who tackle arguments in two entirely different ways. It is just like reading the threads sometimes.
The older boy starts with, "I know everything there is to know cos I am older than you."
The younger says, "Did you know this fact that refutes your proposition?"
Older boy says, "The person who came up with that fact is not to be believed because I don't agree."
Younger boy, "Why don't you agree?"
Older boy, "Why don't you listen? I told you I don't agree because the person who said that fact is not to be believed."
Attach those methods of debate to the intense threads on here and see how well they fit - at least when I read them I don't have the shouting that accompanies my sons' arguing though!
In the case of t'interweb google is firmly to blame.
Being able to use a search engine isn't the same as being knowledgeable about a subject. Especially when a person only searches for information to support their misguided opinions.