Why do some people believe civil liberties should be sacrificed?

Answer with Explanation

Some people believe that civil liberties should be sacrificed in order to favor national security and gain enough protection. To combat terrorism after 9/11 attack, fewer Americans demanded that it was necessary to give up the civil liberties for the security and restrain terrorism and avoid any kind of violence in the country that might be intolerable for the citizens. Extraordinary protection is requested to prevent the threats of terrorism that has become much more devious than before.