Sunday was no different.

Just as the nation needed unity, Mr Trump said President Obama should resign in 'disgrace' for refusing to use the term Islamic terrorism so early on in the events.

Moreover, in being so keen to foment fear about Islamic extremism, the presidential candidate played to the very hopes of the Islamic State of Iraq and the Levant.

Isil may at its heart be a nexus of commanders in Syria and Iraq. But it's power is not as a coordinated army. It is, rather, the strength of its poisonous ideology.

It has become an umbrella term by which psychopaths feel they can justify deranged acts.

Mateen did not travel from Syria or Iraq. His hatred was bred in the New York streets where he grew up (Mr Trump notably failed to reiterate his policy of banning Muslims from entering the United States after the news of the attack).

Isil has become a way for the dangerously mentally ill to find meaning in their madness. They adopt the Isil flag as a cover for their own private motives.