when you don't drink you remain in sound mind
I'd add, "only if you were of sound mind to begin with" to that.

You are right, Hitler was very inteligent individual. But social forces caused him to be misguided. Unfortunately, he was also a very charismatic person, so people actually listened to him...

Nationalism is a powerful motivator, it causes people to stop asking questions. Patriotism is also a powerful motivator, but it necessitates questions. Unfortunately, most people don't look at those subtle differences, and start calling patriots subversives.

When all else fails, ask questions. Maybe someone will be able to answer them, but at least someone might pause and think. The devils advocate is an important possition in society, without it we might plunge headfirst into the shallow end of the pool.
dhej