It's simple! Different people have different opinions and any opinion is valid - A simple way to stop an argument is to say: "It looks like we disagree on that point, and that's all right - I have a different opinion but I respect yours" - Done!
So why keep on arguing? - If you enjoy it feel free to play of course - Debating is friction and friction is energy - If you see someone looking for reasons to disagree with you, all they are doing is trying to generate heat and energy which will make them feel more alive.
Once you realize that you are free to stay and play or leave - The choice is yours - Enjoy!