I just posted in another thread with an observation that answers this question as well.
Those who rely on cerebral cognition are happy to understand the strengths and weakness of other cultures. They want to learn what good ideas other countries can teach, and so on. Liberals are happy to embrace what’s good about their country, but willing to question, and willing to change what isn’t good.
The more vulgar aspects of patriotism often involve fear and disgust of “The Other.” Thus it is normal to expect exaggerated patriotism to correlate with amygdalar cognition.
Amygdalar cognition certainly does have its own very important roles to play. When the enemy is charging I may prefer that my foxhole buddy is an amygdalar type, rather than an erudite over-thinker! When we had “big tent” political parties, we could learn from people with alternative modes of cognition. Those days are gone, and now all we can do is point fingers at each other: “You want to kill babies!” … “I’m more patriotic than you!” … Very sad.