WASHINGTON — A diabolical range of recent attacks claimed by the Islamic State — a Russian airliner blown up in Egypt, a double suicide bombing in Beirut and Friday’s ghastly assaults on Paris — has rekindled a debate over the proper limits of government surveillance in an age of terrorist mayhem.
On Monday, in unusually raw language, John Brennan, the C.I.A. director, denounced what he called “hand-wringing” over intrusive government spying and said leaks about intelligence programs had made it harder to identify the “murderous sociopaths” of the Islamic State.
Mr. Brennan appeared to be speaking mainly of the disclosures since 2013 of the National Security Agency’s mass surveillance of phone and Internet communications by Edward J. Snowden, which prompted sharp criticism, lawsuits and new restrictions on electronic spying in the United States and in Europe.
In the wake of the 129 deaths in Paris, Mr. Brennan and some other officials sounded eager to reopen a clamorous argument over surveillance in which critics of the spy agencies had seemed to hold an advantage in recent years.