They've united to fight the common enemy, burying all political differences, for the larger good of the nation. Sure, this would effectively nullify any major opposition, but Pakistan is a noisy country thats just beginning to break a near decade long autocracy and I doubt the new alliance will be able to do much damage, especially with the international community keeping close watch over its performance vis a vis the Musharraf regime. In my humble opinion, PPP-PML is 'more good' than bad.
