"The ultimate test of a relationship is to disagree but hold hands."
~ Alexander Penney
So true. Whatever the relationship, it's tough when you disagree with someone. This doesn't mean you have to stop the relationship, or avoid the person. What kind of testament to your character and opinion is that?
I don't see the point in quarreling (blatantly). I do see the point in learning before making an opinion. Learn from your relationships. Listen and study all aspects of a specific person, topic, etc. How else can you really talk civilly? We weren't all raised the same.
"People generally quarrel because they cannot argue."
~ Gilbert Chesterton