The mass murderer reportedly pledged allegiance to Islamic State (ISIS) supremo Abu Bakr al-Baghdadi before mowing down his victims while screaming "Allahu Akbar!" He was also born to parents from jihadist-infested Afghanistan and previously had a wife from Uzbekistan, another jihadist hotbed.

All these were clear indications that Orlando shooter Omar Seddique Mateen was a Muslim fanatic.

And yet U.S. President Barack Obama never once mentioned "Islam," "Muslim" or "Islamic terror" in his televised address to the nation condemning Sunday's terrorist attack that killed at least 50 people and wounded 53 others—the worst act of terror in America since 9/11, WND reports.

Once again as in previous terror attacks perpetrated by Muslim radicals, Obama refused to link the attack on a gay nightclub in Orlando, Florida on Sunday to Islamic terror, arguing that "no definitive judgment" had been made on the motive.

"We know enough to say this is an act of terror and an act of hate," Obama said. He then used the attack to promote his gun-control policies.

"What is clear is he is a person filled with hatred," Obama said, referring of the Muslim terrorist Mateen.

Following Obama's speech, the ISIS claimed responsibility for the Orlando terror attack.

Critics immediately pounded on Obama for his refusal to link terror to Islam.

Presumptive Republican presidential nominee Donald Trump issued a statement following the terror attack, calling on Obama to resign for his refusal to even say the words "radical Islam."

Trump said, "If we do not get tough and smart real fast, we are not going to have a country anymore. Because our leaders are weak, I said this was going to happen – and it is only going to get worse. I am trying to save lives and prevent the next terrorist attack. We can't afford to be politically correct anymore," Newsmax reports.

Former ambassador to the United Nations John Bolton for his part said the U.S. will never be able to stop terrorism as long as the Obama administration attempts to treat the attacks solely as a law enforcement matter, not as a struggle against an Islamic ideology that despises America's entire way of life.

If Obama continues to omit any linkage between "the cold-blooded murders, the terrorists' ideology and the broader international threat that motivated the killer," there will be no way to defeat the enemy, Bolton wrote in an op-ed published by Fox News.

"When you see an act of war like this committed against us, don't tell me about gun control, tell me about how we are going to defeat these people who are motivating terrorists" to act against the United States, he said.

"The facts don't seem to matter to this administration," former CIA Director James Woolsey told Fox News.

"The president's speech today is a national and international disgrace," said former federal prosecutor Larry Klayman, founder of Judicial Watch.

"Being born to a Muslim father and schooled in madrassa schools in Indonesia, and having as his friends and supporters domestic Muslim terrorist sympathisers like Rev. Louis Farrakhan of the Nation of Islam, President Barack Hussein Obama refuses to fight much less address Islamic terrorism in any meaningful way," Klayman said.