One thing we learn as Christians is that our conduct reflects the God we represent. Honestly, that’s a sobering thought when I think about my own behavior. Our Sunday School lesson is about unity. Our unity showcases the beauty of the cross. So fights and squabbles produce the opposite effect. It is no wonder that we are called to be one, unified together.
Take some time to talk about this at home. Our home requires several discussions about unity and putting others first; maybe this will help your own family dynamics.