I figured it out. Red John is actually a man who is in love with Patrick. However, since Patrick was married there was no way he could be with him. So Red John killed his family so Patrick would become single. In the end, when Patrick finally has Red John, he will realize that he has actually enjoyed all this chasing around  and has fallen for John as well. The last episode will be them getting married. Once Lisbon finds out Patrick and Red John are getting married, she is goes to kill Patrick for being a homosexual and not being in love with her. Since Bruno Heller is a well known gay activist, it becomes obvious this show is a metaphor for why Gays should be able to marry in all 42 states.