Op-Ed Columnist - Calling All Pakistanis - NYTimes.com

After all, if 10 young Indians from a splinter wing of the Hindu nationalist Bharatiya Janata Party traveled by boat to Pakistan, shot up two hotels in Karachi and the central train station, killed at least 173 people, and then, for good measure, murdered the imam and his wife at a Saudi-financed mosque while they were cradling their 2-year-old son -- purely because they were Sunni Muslims -- where would we be today? The entire Muslim world would be aflame and in the streets.

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Sure, better intelligence is important. And, yes, better SWAT teams are critical to defeating the perpetrators quickly before they can do much damage. But at the end of the day, terrorists often are just acting on what they sense the majority really wants but doesn't dare do or say. That is why the most powerful deterrent to their behavior is when the community as a whole says: "No more. What you have done in murdering defenseless men, women and children has brought shame on us and on you."

Why should Pakistanis do that? Because you can't have a healthy society that tolerates in any way its own sons going into a modern city, anywhere, and just murdering everyone in sight -- including some 40 other Muslims -- in a suicide-murder operation, without even bothering to leave a note. Because the act was their note, and destroying just to destroy was their goal. If you do that with enemies abroad, you will do that with enemies at home and destroy your own society in the process.