Eugene E. Brussell

[A demagogue is] one who maximizes his appeal to the frustrated, to the dispossessed of the earth. He offers vivid and dramatic, simplistic solutions to all of life's problems.

[A fanatic is] one compelled to action by the need to find a strong meaning in life. The fanatic determines for himself what role he is to play in life, and his intense devotion to a cause is the means.