Would you give up civil liberties to fight terrorism?

We in the U.S. have already done so by allowing the U.S.A. Patriot Act to be passed and renewed on multiple occasions. Good luck to us getting all those civil liberties back. Trading liberties for safety's sake is essentially trading liberties for a certain kind of tyranny. What good is the 4th amendment if the FBI can conduct a search without a warrant simply saying they are doing it in the name of national security and to thwart a potential terrorist threat?