I have made a Stalker brutal slayer fear Monger. And I know some one is going to try and negate demoralizing.
For example. If a dread, anti-paladin, PoW character with jailer of damned or black seraph annihilation, encounters an undead, by the listed ability they would be able to fear them.
But what if the undead had a magic item that gave it a second fear immunity. Would it also be negated or would the secon immunity protect it.