This is a poor example. If someone insults me and refuses to even CONSIDER trying to see things from my perspective, they should have no reasonable expectation that I'll continue being their friend.
I touch upon this in my op-ed piece entitled "Is Losing Friends Really Such a Bad Thing?" --
https://medium.com/the-masterpiece/is-losing-friends-really-such-a-bad-thing-f2704bebc5df