Although almost all states agree that all forms of terrorist activities should be condemned, states do not agree upon a definition of terrorism. Terrorism is a major threat to fundamental human rights, especially the right to life, and violates human rights grossly and systematically. No matter what pretext terrorists may use for their deeds, terrorism in all its manifestations and forms should be treated as a crime against humanity. The measures taken by states against terrorism should comply with the requirements of international human rights law. In this respect, any measure has to respect the human rights of both innocent civilians as well as terrorism’s perpetrators. As a result, respecting human rights is sine qua non when fighting terrorism; at least minimum human rights standards should be provided, and a balance between liberties and security must be established in every area by states. However, this does not mean that human rights law can be perceived as law to protect terrorism for political purposes.