Winning an argument isn't winning anything worth winning unless it has some impact on the way people think and behave. It might make us feel better to come back with a smart rejoinder or a forceful epithet, but making us feel better isn't the main thing.

If the smart rejoinder and the forceful epithet has the effect of pushing away someone who was hovering on the brink of changing their views on the war, for example, it's not worth it. Remember more people read threads than ever post to them.