Knee-jerkish

Thus to judge their heart-felt reactions, some of which may look "knee-jerkish" at times, without taking into account their past bitter experiences, their present insecurities, or their dreams would be presumptuous, to say the least.

It seemed a little knee-jerkish anyway, too obvious for the neighbor across the street to do, and a little too much like adolescent vandalism for my own conscience.

Fukuda cares deeply about policy issues. He worries that Abe is a bit shallow on policy matters, and a bit knee-jerkish in his populism.