I agree with this, but we must remember that Christ is the only way to truly defeat evil, and only He will rid the earth of the Satanic cult of Islam for good. That is not to say we should not aim to defeat ISIS militarily we should but it will only be a temporary band-aid.
Your approach did not work against the Nazis or Japanese, why do you think it will work against the Muslims? The Nazi desire to rule the world, the Japanese suicide cult, and the Muslim murder/suicide cult are the same. Love will not work. You must kill them.