Its also kinda worrying IMO, as it seems to indicate that (surprise, surprise) political reasoning is far more emotional than logical, logic being independent of the hormone balance of the person doing the reasoning.

I don't disagree with the conclusion of political reasoning being more emotional than logical, but "hormone balance affects one's political stance" doesn't necessarily imply that conclusion. Hormone balance could also affect your values. So even if everyone was a perfectly logical reasoner, hormone balance could still put them in different political camps since their values would be different. (The most stereotypical hormone -> values pathway that comes to mind would be that both women and left-wing groups are generally thought to put a higher value on the care/harm axis of the MFT than men/right-wing groups do.)