Basically fundamentalism is a modern phenomenon. In the same way that Hitler evoked a mythological religion of German purity and the glory of the past the Islamists use religion to evoke emotions and passions in people who have been oppressed for a long time in order to reach their purpose.
As long as man continues to be the ruthless destroyer of lower living beings he will never know health or peace. For as long as men massacre animals they will kill each other.
