Radical Islam threatens American democracy. It is slowly subverting America from within and without. If it is not stopped, U.S. civilization is doomed.

For decades, Europe has been in the grip of an Islamist assault. Largely ghettoized Muslim populations have become dangerously alienated from the European mainstream. From Paris to Hamburg, Germany, radicalized imams preach the virtues of global jihad. Subway systems in London and Madrid have been bombed; hundreds of civilians have been slaughtered. Dutch filmmaker Theo van Gogh was murdered.

These atrocities were committed largely by homegrown terrorists - people who were either born or raised in European countries. They felt no loyalty to their homelands. Instead, they considered themselves part of the Muslim ummah, the international Islamic political community. Their religious identity supersedes their national one.

America faces the same kind of threat. Yet when anyone tries to put a spotlight on the growth of domestic Muslim extremism, liberals, Islamic lobby groups and their fellow travelers cry “Islamophobia” and “racism.”

The latest example was the congressional hearing held by Rep. Peter King, New York Republican, who dared to examine how some U.S. Muslim youth are being radicalized and recruited by terror networks. The American Civil Liberties Union, the Council on American Islamic Relations (CAIR) and the Democratic Party all claimed the hearing was not only unjustified and deeply discriminatory, but could spark an intense backlash among many in the U.S. Muslim community.

The critics even argued that this could provide fodder for al Qaeda and other jihadists to commit more terrorist acts. In other words, Islam is a “religion of peace” unless you investigate some Islamic extremists who may be plotting to kill or maim Americans; then that will compel peaceful, law-abiding Muslims to wage jihad. This is the twisted - and perverse - logic of the multicultural left.