My parents have been married for past 36 year. And their marriage isn't the perfectly and happily ever after one. After I grew up, I tried arguing/ reasoning/ proving things that were wrong. And it used to solve the problem temporarily but then they would again get back to square one. Millions of promises made, tears shed, I was able to foresee a happier family.
But nothing changed ever. The changed behavior would prevail for few days only. That is when I realized an important thing in life.
You can't change anyone other than yourselves. And no one can change their attitude till they really don't want to, and make an extra attempt in that direction.
Your parents are adults. If there is a misunderstanding may be you can help in clarifying it. Otherwise ignore if you want a peaceful life.
Go to your room, turn the music to full volume and do your work. Don't ever listen to their argument. Stop thinking about it the whole day.