American and British intelligence officials are beginning to talk now as though they believe they have killed Mohammad Emwazi, aka Jihadi John.

The strike was quick but it was months in the planning.

It goes to show that patience is a critical ingredient in this war against terrorism and the people who commit these horrific acts.

Emwazi was a British citizen, born in Kuwait but reared in the U.K. He became a propaganda tool for the Islamic State and was video-recorded beheading captive foreigners, the first of whom was U.S. journalist James Foley.

Yes, a lot of folks demanded immediate justice. As it turned out, though, in the hunt for Osama bin Laden, these efforts require tremendous coordination, attention to the tiniest detail and absolute certainty that we’ve got the bad guy right where we want him if we intend to strike.

The hunt for bin Laden commenced right after the 9/11 attacks. The Bush administration hunted far and wide across Afghanistan and Pakistan. Bin Laden almost got it at Tora Bora, Afghanistan. He got away. President Bush left office in January 2009, handed the operation off to President Obama, who then took up where his predecessor left off.

Detailed analysis of intelligence led the Navy SEALs and CIA spooks to the Pakistan complex, where they found bin Laden — and then shot him to death.

Emwazi’s death — which is beginning to sound more certain — was delivered after tremendous effort by U.S. and British intelligence agencies and military planners from both countries.

What’s the lesson?

It’s that we cannot antsy when we don’t bring justice to these monsters right away.

Patience, folks. Patience.