Friends or thought to have been?

A little while ago a former friend of mine called me out on some unimportant issues. I couldn't understand it. WTF. And imagine this it was all over some internert postings from a forum that I am on. Pretty much took him to task in a 15 minute heated discussion. When I had him cornered, all of a sudden I have to go I have another call and he hung up on me. Come to find out this same person had it out with a few other mutual friends also. Apperently he is having issues.