, "You people will never be safe. Remove your governments, they don't care about you." — Michael Adebolajo, one of two men arrested in the murder of British soldier Lee Rigby . Here we go again. Brazen and brutal attacks against British and French soldiers. In broad daylight. At the hands of homegrown Islamic extremists (Mr. Adebolajo is reported to have shouted "Allahu Akbar!" as he struck). European conservatives reflexively clamoring for a crackdown on Islamic fundamentalism. The left reflexing reminding us that the West is not at war with Islam. This latest horrific chapter of Islamic radicalism brings me back to a topic I have often chronicled over the past 20 years: the specter of multiculturalism. At the outset, it is important to distinguish between the ethnic and racial pluralism Americans celebrate and the multiculturalism we must reject. It is a distinction deliberately muddled by the progressive left. Accordingly, a vital societal goal is present...