The problem of people using "faith" as a valid form of reasoning is the only measurement is 'conviction'; the only measure of conviction is sacrifice. This is why 'faith' creates terrorism.
So it would take a great deal of intellectual dishonesty for any religion to dispute that unfortunately in the war of faiths that the suicide murderer is in fact the most 'convicted to their faith, and by this measure the suicidal murderer is exhibiting 'the one true religion'.