The arrest of a controversial Dutch cartoonist has set off a wave of protests. The case is raising questions for a changing Europe about free speech, religion and art. Amsterdam On a sunny May morning, six plainclothes police officers, two uniformed policemen and a trio of functionaries from the state prosecutor's office closed in on a small apartment in Amsterdam. Their quarry: a skinny Dutch cartoonist with a rude sense of humor. Informed that he was suspected of sketching offensive drawings of Muslims and other minorities, the Dutchman surrendered without a struggle. "I never expected the Spanish Inquisition," recalls the...