If anyone feels belittled, I apologize. However I expect that the people I engage in discussion with to have the ability to follow a reasonable line of discourse. If it is pointed out to them that they made a basic factual error, such as asserting that GW Bush left office in 2008 instead of 2009, and then basing further argument on that 'fact', it's not too much to expect them to acknowledge the error and move on. No one here is perfect and we all can learn from each other. If we can be muture enough to say, "oops, my bad", then no one else would care and in fact doing that (admitting a mistake), gains you a lot of cred with the members.
If someone is just here to stake out a position and defend it at all cost, no matter what the facts are, or if they are posting only for the purpose of evoking a negative emotional response, then don't expect to be taken seriously or treated with much respect.
Sometimes customers get thrown out of stores.