"Fuck 'Em If They Can't Take a Joke" Explained

One of my sayings (that I'm sure that I borrowed from somewhere) is "Fuck 'Em If They Can't Take a Joke." What I mean when I say it is that everyone has to maintain perspective in a discussion. If I'm talking about religion or politics with friends, we all need to keep in mind that we want to stay friends at the end of the discussion. Spirited debate is good until one or more of the debaters loses perspective and becomes unmeshed in a win at all costs mentality. At that point, I have no more use of them, so fuck 'em.