The Gallite are paranoid and distrustful creatures.  Their society is arranged in a strictly hierarchy in which the only way to move up in society is through murder and assassination.  In addition, the only way to maintain your position in Gallite society is also through murder and assassination.  The Gallites distrust everyone, especially their friends and allies.  Many believe they have more spies dedicated to watching their Union "allies" than they have dedicated to their enemies.