Book excerpt: Mutual understanding and acceptance is perhaps the main challenge of modern society. Diversity is undoubtedly an asset, but cohabiting with people of different backgrounds and ideals calls for a new ethic of responsible intercultural relations, in Europe and in the World. This book tries to answer a series of pertinent and poignant questions arising from these issues, such as whether it is still possible to criticise ideas when this may be considered hurtful to certain religious feelings; whether society is hostage to the excessive sensitivity of certain individuals; or what legal responses there may be to these phenomena, and whether criminal law is the only answer.