Jane could have done this subconsciously, his mind is intricate enough for this to happen. We all like him but it can't be denied he's manipulative. I think that during his subconscious phases where he resorts to being Red John he has arranged with people plans. I think his seven main people for these kinds of arrangements are the same seven people he has put into his final suspect list.
There are lots of reasons for Jane being Red John, read any of the other theories they're more or less the same. But what really makes me suspect him is the show itself and they way it picks its killers. They always throw lots of obvious suspects at you with reasons that make perfect sense but it always ends up being the person you like or sympathise with the most that turns out to be the killer. Out of every single character in the show Patrick Jane is the most beloved, in their mind he's the ultimate final answer to this case. Oh, and I just love the idea of him naming his seven suspects/helpers each after the seven deadly sins.
