Here is the final final from my old, now ex friend. She could not talk, just argue, No ability to have a give or take discussion. No ability to learn. There is nothing as stuck in its shell as an old leftist. It was not much of a friendship but I cared for her.
She said:
"We have opposite perceptions of the realities of the world and of what is important so unfortunately we've reached a point in our friendship where there isn't much to talk about, only to argue over."
Never stay friends with someone who is too small.
Sorry to hear that it came to that. Sounds to me like she was the one who didn't believe there was any friendship to save. Consider it a learning experience and know in your heart and mind that she is the one who lost out in all of this, and she lost out because she is now without you as a friend.