Stormy Clouds, you have two friends and got sucked into the middle of their disagreements. You avoided them so not to be in the middle. After the fact one friend reads you the riot act that you abandoned them. So you apologize and they in return chew you up and spit you out. They are not nice to treat you like that. They could say they were disappointed but accept your apology and move on being friends. But real friends don't chew you up and spit you out. THEY ARE NOT YOUR FRIEND THE WAY THEY TREATED YOU... IT IS NOT YOUR PROBLEM, IT IS THEIRS...
That is what it means it is not you it is them. You are a good person and did right to keep your nose out of something that did not concern you. They wanted from the sounds of it for you to take sides. They got pissed off that you didn't so wanted to treat you like crap over and over again punishing you for it. THAT IS NOT A FRIEND. I hope that his helps. Move on, there are more people in the world to be friends with and you can do better, YOU DESERVE BETTER... Blessings