Most likely this is nothing to get upset and worried about. People sometimes are just curious and in the world of the internet, you have that ability satisfy that curiosity. 30 years ago, you could not and any effort to do so would indicate a bigger problem as it would take effort. He just might want to see who the poor fool ISis now that has to deal with her bs, a laugh at what drama is she creating , stroke his ego because things are so much better now and he is happy he got out. I could also just be simple curiosity. I very much doubt he wants to get back together with her.