You've misunderstood my meaning. I'm saying you often get worked up to the point that your anger overrides any points you're trying to make. This sometimes gets to the point where instead of making you're argument you go off on a tangent about how awful something else is. Heated debate versus impassioned debate
You'll make a much better and more reasoned argument if you just walk away for a while and come back to the discussion with a calmer mindset. You'll also avoid the slippery slope of devolving your arguments into insults against the person you're debating against.