After many a disappointment with someone, and especially after a disaster, we may be able to look back at numerous clues that should have warned us that the person we trusted did not deserve our trust.

When that person is the President of the United States, the potential for disaster is virtually unlimited.

Many people are rightly worried about what this administration's reckless spending will do to the economy in our time and to our children and grandchildren, to whom a staggering national debt will be passed on. But if the worst that Barack Obama does is ruin the economy, I will breathe a sigh of relief.

He is heading this country toward disaster on many fronts, including a nuclear Iran, which has every prospect of being an irretrievable disaster of almost unimaginable magnitude. We cannot put that genie back in the bottle-- and neither can generations yet unborn. They may yet curse us all for leaving them hostages to nuclear terror.

Conceivably, Israel can spare us that fate by taking out the Iranian nuclear facilities, instead of relying on Obama's ability to talk the Iranians out of going nuclear.

What the Israelis cannot spare us, however, are our own internal problems, of which the current flap over President Obama's injecting himself into a local police issue is just a small sign of a very big danger.

Nothing has torn more countries apart from inside like racial and ethnic polarization. Just this year, a decades-long civil war, filled with unspeakable atrocities, has finally ended in Sri Lanka. The painful irony is that, when the British colony of Ceylon became the independent nation of Sri Lanka in 1948, its people were considered to be a shining example for the world of good relations between a majority (the Sinhalese) and a minority (the Tamils). That all changed when politicians decided to "solve" the "problem" that the Tamil minority was much more economically successful than the Sinhalese majority. Group identity politics led to group preferences and quotas that escalated into polarization, mob violence and ultimately civil war.

Group identity politics has poisoned many other countries, including at various times Kenya, Czechoslovakia, Fiji, Guyana, Canada, Nigeria, India, and Rwanda. In some countries the polarization has gone as far as mass expulsions or civil war. Continued...