scatbrain
n. Ironically designates a person who dwells on or expostulates ideas that are old, discredited or unintelligible. The scatbrains are the uneducated lower class cousins of the educated upperclass fecal-minded eggheads.
Joe is a scatbrain. He keeps saying torturing is a legally acceptable way to obtain information from suspected criminals and terrorists.. His sense of morality is twisted by his ideological zeal and his biases.