It's not jealousy. At least those I know who have problems between other members don't seem to have it.
It usually comes down to personality conflict. And even alot of times misunderstanding of ones intentions as words get lost in translation.
Heck.. I had a tif with a member from New York recently. All because he thought my intentions were making fun of him by simply calling him the dude from New York. That's just mis-interpretation of my dry sense of humor. But it was seen as slander(ist?).
But I don't think most any of what happens here is because of jealousy.
And let's face it.. some dudes are just ****s.