Jihadists are by no means a majority in the Islamic world, where they are also feared and hated. And in the West, they are but a fraction of our Muslim communities.
The crisis: Even a tiny minority of terrorists like the Tsarnaevs can so inflame tensions between the West and the Muslim world they can bring our two civilizations into conflict. Would we have fought those wars in Iraq and Afghanistan without the atrocity of 9/11?
What are the goals of the jihadists?
Expulsion of Christians and infidels from the Dar al-Islam, the house of Islam. Expulsion of the American Crusaders. Overthrow of Muslim rulers who collude with the Great Satan. Annihilation of Israel. Infiltration of the homelands of a decadent, dying West. Death to all who insult the Prophet.
Ultimate goal: Bring the world to acknowledge and act on the truth that there is no God but Allah and Muhammad is his Prophet.
And while the Islamic world remains far inferior in technology and manufacturing and military power, Muslim peoples are far more numerous and devout. With a fourth of mankind, their birth rate is higher and their numbers soaring, along with their militancy at home and in the diaspora.
In population and territory, the West is shrinking, while our Muslim minorities are growing and becoming more assertive in their demands.
"No army can withstand the strength of an idea whose time has come," said Victor Hugo. Many in the Muslim world believe that as the Christian West dominated for 500 years, their time has come.
How do we deal with this irreconcilable conflict between a secular West and a resurgent Islam?
First, as it is our presence in their world that enrages so many, we should end our interventions, shut down the empire and let Muslim rulers deal with Muslim radicals.
Second, we need a moratorium on immigration from the Islamic world. Inevitably, some of the young we bring in, like the Tsarnaevs, will yield to radicalization and seek to strike a blow for Islam against us.
What benefit do we derive as a people to justify the risks we take by opening up America to mass migration from a world aflame with hatred and hostility over race, ethnicity, culture, history and faith?
Why are we bringing all of the world's quarrelsome minorities, and all the world's quarrels with them, into our home?
What we saw in Boston was the dark side of diversity.