I always thought they were a good parallel to the Dominion vs Federation conflict. My only problem is the lack of fleshing out. Prepare yourselves, the next part is very philosophical...
If you believe the theory that the prophets are dead Bajorans, ascended, transmuted, and evolved to a Godhead, the pah wraith could be nasty, twisted souls of dead Bajorans who lived Machiavellian, deceitful, twisted lives (ie Kai Winn, may she Rot in Fire Caves RIFC).
If so, the reasons for their exile could be that they created discord within the Celestial Temple by reasoning that Bajorans would be a better people if they intervened (ie stopping the occupation) or telling the Bajorans to live for selfish reasons, motivations in life including accumulation of wealth, power.
Obviously, many Bajoran Pahs might have disagreed with them, but assuming that Bajor is like the modern US, maybe it was a pretty even split (think political polarization). It makes sense, that if you hold two completely different set of ideals that is diametrically opposed to the other (pay wraiths would say the prophets were weak for not being bold and hawkish) that there will eventually be a fight of some sort for something as important as the existence of Bajor.
That's making a big assumption, but seeing as how these views would be akin to the views of the Federation regarding a protocol with less advanced civilizations (Prime Directive), I think I prefer this belief.
As Kira would say, its a matter of faith.