The best way to combat terrorism is to boldly share the Gospel, to boldly live out the Gospel, and to pour ourselves into our churches. The church is God’s evangelistic program, and the healthier the church the healthier the witness as it images forth the glory of God.
Then go share the Gospel with every Muslim you meet. Give your money to send missionaries into the Muslim world. And recognize the disparity between Christians and Muslims: they send terrorists to kill innocent people, and we send them missionaries to tell them about the love of Jesus (point this out to the liberals who accuse us of cultural oppression as we seek to evangelize people).
This is the best way to wage the war on terror because evil is self-defeating and nothing can stop the power of the word of God. Nothing can stop the Gospel, it is the power of God for salvation. If they believe the Gospel, they won’t be terrorists. More importantly, they won’t go to hell and God will get the praise he deserves from them.