The 15 years that have passed since the 9/11 attacks is a long time — sufficient time to process what happened to our nation and figure out how best to move forward. It is said that those who do not learn from history are destined to repeat it. So what have we learned from that day 15 years ago?

Absolutely nothing. Rather than gain new understanding and insight from the vicious acts that were done to our citizens and our country — we have instead excused them, created false narratives, and exacerbated the problem one hundredfold.

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We have erected our Freedom Tower in place of the Twin Towers. We make pilgrimages to the 9/11 Museum. We recall the terror of that day, as we did this past weekend, and we recall the people, the ideas, the memories that were. But our thoughts are becoming clouded and muddled from a steady diet of propaganda that is spoon-fed to the American public from pro-Islamic organizations — and by the Obamas and the Clintons.

Meanwhile, the world implodes around us, as Islamic extremists try to lead a death march across the continents.

The planet is being claimed for Allah and his kingdom is being established everywhere, even here in the last bastion of freedom — America.

Mohamed Atta and his fellow 9/11 hijackers assumed their place in Allah’s kingdom upon their “glorious” deaths and set off an absurd dialogue, from the upper echelons of the United States government to the coffee houses in California, that goes a bit like this: What did we do to make these people hate us? Surely they must be poverty-stricken and desperate to make a point for the sake of their fellow countrymen. Perhaps if we hadn’t meddled in the affairs of the Middle East and Africa, we could have avoided the conflict. We should attempt to understand them better and embrace our cultural differences.

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Absurd! Atta, the tactical leader of 9/11, was a devout Muslim who often taught in the mosque. The son of a lawyer in Cairo, Egypt, he had obtained a degree from Cairo University and earned his master’s degree abroad in Germany. He was a brilliant student who achieved fluency in German in only three months. He studied architecture and engineering and was allied with a similarly-aligned syndicate of the Muslim Brotherhood.

His devotion to Islam was evident long before he came to the United States in a green card lottery. He also studied at a flight school in the Philippines, trained with and met with members of al-Qaida and Khalid Shaik Mohamed, the 9/11 mastermind, and taught strict adherence to Islam at Al Quds Mosque in Hamburg. There can be no misunderstanding of who Atta was.

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The late Dr. Hassan Hathout, a major player in the interfaith movement, was a keynote speaker at the Clinton White House in the late 1990s. Hathout outwardly preached a message of love and unity, but he was first and foremost a devoted Muslim who was described in his obituary as “a disciple of the Muslim Brotherhood founder.”

Indeed, he served in war on behalf of the Muslim Brotherhood and did prison time in Egypt for his allegiance to the organization and its goals. Dr. Hathout said, “When our country becomes what we dream and when our society becomes warmer and more inclusive … it will be written in history in letters of light that the first first lady who took a major step to greet, include and to communicate with Muslims is first lady Hillary Rodham Clinton.”

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Organizations like CAIR (the Council of American Islamic Relations) and others immediately went into redirect mode after the 9/11 attacks, passing terrorism off as the actions of a handful of lone wolf extremists. They had their finger on the pulse of Americans and used a divide-and-conquer strategy deftly, as Americans began to debate and argue over the whys of 9/11, even going so far as to blame ourselves for the tragedy. Attention was diverted from the truth.

“Muslims are peaceful and tolerant people and have nothing to do whatsoever with terrorism,” said Hillary Clinton.

More recently, those same diversion tactics were used after the San Bernardino and Orlando nightclub massacres. Before Americans could arrive to claim their dead, the national news featured talking heads from the Islamic community claiming that none of the atrocities had anything to do with Islam. Americans nodded in agreement, concluding that those acts could only be attributed to mental illness — and we moved on. And rather than addressing the threat head on, we are welcoming scores of refugees from Islamic countries with no way to vet them, their backgrounds, or their potential for militancy.

Hillary Clinton, if she becomes president, promises instead to welcome a record number of people from Muslim countries to our shores, vowing to throw open the borders and further deceive the American public. “Let’s be clear: Islam is not our adversary,” she said in November 2015. “Muslims are peaceful and tolerant people and have nothing to do whatsoever with terrorism.” She knows better — and so should we all.

Islamic terror is on the move. Atta, Omar Mateen, and countless foot soldiers are spreading that terror and furthering the radical Islamic movement by committing heinous acts. A Hillary Clinton presidency would make their job an easy one.

Related: We Need Peace in Our Troubled World

The truth can be found, but Americans must seek it. Atta did not hide the truth. The verse he used from the Quran as the conclusion of his master’s dissertation was unquestionably clear about his intent. He was willing to lay down his life in service to Allah, and he most certainly did.

Quran 6: 162-163 — Say, “Indeed, my prayer, my rites of sacrifice, my living and my dying are for Allah, Lord of the worlds. No partner has He. And this I have been commanded, and I am the first [among you] of the Muslims.”

America — wake up! Islamic extremism is the problem.

Mark Christian, M.D., is the founder and executive director of the Global Faith Institute (globalfaith.org) and is an Egyptian émigré to the United States and a convert to Christianity. His father and uncle remain high-ranking leaders of the Muslim Brotherhood in his former home of Cairo.