While I do not support radical fundamentalist Muslims, I refuse to judge a race of people who follow their Muslim faith. In all fairness, have you read the Q'uran? Are there NO truths in it whatsoever?
Ecumenism, like politics, begins with acknowledging that which is shared. Vatican Council II, noted this when it wrote ... although differing in many ways from her own teaching, these nevertheless often reflect a ray of that truth which enlightens all men.23