Shows the value of your friendship.
What this person is arguing is not for pacifism, its an argument that to be their friend you must agree with them on pacifism.
I have my own thoughts and beliefs. My friends have theirs. They arent all the same. Thats how it should be, and thats healthy. Thats diversity. This "you're dead to me if you dont believe what I believe" culture is idiotic and is not inclusive at all.
Friends have to be honest with each other. Friends don't let friends become fascist!