It's bad to get into fights with people.
Roy is online reading a post from a friend who supports the opposite political party.
Roy wants to present a statement to defend his own party.
Roy makes a logical statement and when the contention rises he suggests they agree to disagree.
Roy presents his case and then proceeds to fight with his friend over the topic.
Roy and his friend respectfully disagree, staying on good terms.
Roy and his friend are now on bad terms.