Is it childish that I deleted my Ex Girlfriend and her friends & some of her family members off Facebook?

[Joshua]

My ex girlfriend broke up with me over stupid reasons saying that I wasn't mature enough, my job wasn't good enough, I was too fragile, stupid stuff like that. She broke my heart and I've never had a girl dump me like she did before. She unfollowed me on Instagram and I did the same. She still kept me on facebook but I deleted her, her friends, and some of her family members. Her parents deleted me off facebook for whatever reason so I didn't have to worry about them. It wasn't because I was hurting or that I missed her, I'm just simply moving on. I lost all my respect for her and I don't care about what she's doing anymore. She's history and I've never been happier. Some of my fringe said that it was childish on what I did but I don't see anything wrong with permanently deleting an ex from your life. I've just moved on and waiting for better things to happen in my life. So the question is, was it childish that I deleted her off my facebook?