I take a very simple view that a violent extremist at some point previously been an extremist, and by definition is an extremist, so you do need to look at that non-violent extremism
Non-violence is the policy of the vegetable kingdom.
Non-violence leads to the highest ethics, which is the goal of all evolution. Until we stop harming all other living beings, we are still savages
Truth is my God. Non-violence is the means of realizing Him.