...dude.
The exact same thing happened on here 4 months ago.
Just be glad the person against your opinion had the balls to argue against it, as opposed to deleting the entire topic, making a new one, calling you stupid in said topic, making a big fuss about your opinion on the forum's shoutbox, complaining that the internet was full of nastiness, and then leaving the forums forever after he said he was going to do that before two times prior
Hell, just be glad the person actually read your response thoroughly enough to ARGUE it.