Yes, it is possible that they remain to be friends after the fight.
Explanation:
One's morality sometimes can interfere with other people's morality due to the fact that one may believe something is good and others may think it is bad. When social morality comes, people may convey or agree on something that is beneficial for everyone. That's why Atticus with his own morals can fight against the moral or thoughts of their friends but when they agree in something, the fight will have an end.
