It doesn’t matter to me in the least — in this moment of profound grief and shock — what precisely motivated Omar Mateen to do what he did early this morning in Orlando, Fla.

He committed a terrorist act.

Was he motivated by some perversion of Islam? Was he motivated by hatred of the LGBT community? Was he just pissed off at the world in general?

Mateen was a 29-year-old American who decided to open fire with an AR-15 at a gay night club in Orlando. Fifty people are dead — so far; several of the injured are in critical condition. This madman committed the worst such mass murder in American history.

He has terrorized an entire city. Orlando has been shaken to its core. Mateen died in the melee, which of course deprives authorities of the chance to question the perp about why he committed this dastardly act.

Mateen has completed successfully a singular mission, which was to frighten a community. That, by itself, is the definition of a terrorist.

We’ll get to the truth eventually as to what motivated this monster. He reportedly proclaimed some allegiance the Islamic State; he might have been an ISIS agent, or he might have what’s been called a “lone wolf.”

Perhaps the biggest puzzle to solve will be this: How did this guy, who was on an FBI/Homeland Security “watch list” manage to continue to move about freely — and arm himself with an AR-15?

We’ll get these answers in due course.

Meantime, let’s all say it together: An American community has been struck by an act of terrorism.