Frank wrote: Consecrate makes an area filled with the sacred love juices of your god. It cannot be cast anywhere that the sacred love juices of any other god already flow.
Desecrate, OTOH, impedes the juices of gods. All the gods. It makes Turning, and Rebuking, more difficult. This is normally advantageous for the forces of Evil, but there are times when this can work to the advantage of the forces of Good as well.
Control and Bolster checks are turning checks as well. Penalizing all turning checks is advantageous to the forces of good if the forces of evil have more clerics on hand.
Remember, if they have more clerical power - your turning doesn't work anyway - and the only thing that any turning checks do is allow Evil clerics to make sure that the undead just stab good people instead of both sides, which in turn llows the forces of Evil to come with larger, more powerful undead adjuncts to their forces.
Frank wrote: Control and Bolster checks are turning checks as well. Penalizing all turning checks is advantageous to the forces of good if the forces of evil have more clerics on hand.
Moo? Wouldn't the forces of evil benefit from desecrate? Undead do get bonus when on desecrated ground? The profane penalty stems from the power of evil right? Aren't the bad clerics (pinky to corner of mouth) evil? Why are the good guys casting desecrate? I'm not understanding, seriously.
Undead get bonuses when created on desecrated ground, and are harder to turn or control.
If you are on the battlefield, no undead creation is likely to happen - so desecration simply reduces the ability of the evil dudes to control their alrady created undead.
The +1/+2 bonus to attack rolls, damage rolls, and saves only works when the undead is in a desecrated area. The only benefit of being created in a desecrated area is the +1/+2 hp/HD.
Desecrating an area already desecrated has no effect -- unless the area has an altar to another deity. In this case, you sever the connection to that altar, effectively halving the undead bonuses. Same with consecrating a consecrated area.