See the back-and-forth here.
Generally, I try to be as civil as possible when it comes to internet debates. (Often is the time that I've rewritten a response simply to tone down the rhetoric and eliminate any implied derision.) Certainly, I think that it is a good thing to try and interpret your opponent's arguments in a generous light.
There are limits, though. Life's too short to spend it endlessly rebutting non sequiturs and side issues.