I also like these two comments on a post on the same topic at Pajamas Media:
Galloway represents in purest form the syndrome of Affective Personality Disorder (APD). This entails identifying with "authority figures" in compensation for one's own deep-seated sense of powerlessness and lack of worth. Paradoxically, the weaker and the worse one feels, the Affective Personality strives to take on opposite attributes: Apocalyptic chest-beating, monomaniacal delusions of of grandeur, an "us against the world" mentality focused on tearing down, never building up.
Deride "pop psychology" as you will, we assert that absent clinical extremes Freud's entire discipline is nothing but-- labels, words affixed to quasi-recognizable behaviour patterns. Nonetheless, unscientific as "psychology" may be (no experiements, enumeration versus quantification, no predictive quality), cases such as Galloway's are readily identifiable.
I should also take this opportunity to highlight Will's correct point about my characterisation of Galloway as a racial nationalist:
He's actually an anti-Scottish nationalist - dead against Scottish independence he is. Although this actually works in favour of your overall thesis if you get my drift.