ISIS Supporters Using Trump Travel Ban for Propaganda

Many US counter-terror officials fear the President is unwittingly stoking the radicalization fires of ISIS recruitment with his travel ban of seven predominantly Muslim countries.
4:45 | 01/31/17

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Transcript for ISIS Supporters Using Trump Travel Ban for Propaganda
That's what the president says, more fallout on his immigration ban, the suspension of immigration from seven Muslim majority countries, growing number of experts are arguing the order will make America less safe, strengthen support for ISIS. Our chief investigative correspondent Brian Ross is here with the latest. Reporter: Good morning. The president's travel ban is meant to stop ISIS fighters from finding a way to get to the United States. But among those supporting the president's actions are, in fact, leaders and members of ISIS. Even as the president vows intensified military actions against ISIS, his words are being used by the terror group as proof the U.S. Is at war with the entire Muslim world. On ISIS internet sites since the weekend messages like this one, what trump has done has clearly revealed the truth and harsh reality behind the American government's hatred towards muslims. The ISIS propaganda machine first began stirring it up during the campaign when trump talked of his ban. Donald J. Trump is calling for a total and complete shutdown of muslims entering the United States until our country's representatives can figure out what the hell is going on. Reporter: And now that he's in the white house, many U.S. Counterterror officials fear the president is unwittingly stoking the fires of ISIS recruitment with his travel ban against seven predominantly Muslim countries. Not only does this help ISIS recruit people overseas, but here at home it might be enough to persuade that lone wolf who is thinking about becoming a terrorist. Reporter: But this is not the first time the U.S. Has sought to curtail the flow of refugees because of terror concerns. As ABC news first reported, the FBI discovered two Iraqi refugees connected to Al Qaeda who have been cleared to come to the U.S. And were then caught on surveillance video plotting new terror attacks from their home in bowling green, Kentucky. If you're asking my opinion I would say the system failed. Reporter: Even worse, the FBI found their fingerprints on the remnants of a bomb that killed four members of a Pennsylvania National Guard unit in Iraq. How do you have somebody that we now know was a known actor in terrorism overseas, how does that person get into the united States? Reporter: The two men are both now serving long prison sentences. But their case led to a drastic curtailment of the entire Iraqi refugee program for six months in 2011 and a complete makeover of the refugee screening process. Now the trump administration says it has to do much the same thing, although its list of seven countries misses the very countries that have produced the terrorists responsible for the deadliest of U.S. Terror attack, George. Saudi Arabia. Thanks very much. More from Martha Raddatz. And, Martha, you know, you saw those ISIS media accounts, social media and a lot of experts concerned that just as the military is making progress against ISIS in Iraq, especially, this is going to be a real boost for them. Reporter: There's no question there are concerns about the fallout. ISIS and Al Qaeda as Brian said want muslims to think the U.S. Is against them. So those muslims will turn to them. Now it's offensive to think muslims around the world are suddenly going to say I want to join ISIS because of this immigration ban but if there are people on the fringe, extremists and they see ISIS propaganda about this ban some experts believe that is one more recruiting tool to radicalize them just as we're going after ISIS in Iraq. You saw over the weekend some of the people blocked were people that served as interpreters for the U.S. Military and intelligence in Iraq so there's a real concern if they aren't protected it could have a backlash and hurt our efforts in the Middle East. Reporter: Analysts will tell you this is the most critical problem. We're fighting side by side right now with Iraqis in a battle against ISIS and we're telling those same people who are risking their lives, they can't come into the country. That creates suspicion, resentment and mistrust. The head of Iraq and Afghanistan veterans called it shameful, stupid and bad for national security. He said if we don't help them now, why will others stand with us in the future. The president's announcement has been met with a chorus of riticism from our allies. Reporter: It certainly has and put allies in a very, very difficult position. Theresa may who just met with Donald Trump last week said she does not agree with the ban, the foreign secretary Boris Johnson called it highly controversial while thousands of protesters filled the streets in London calling for may to cancel the invitation for trump to come visit. It's up to about 1.5 million on that petition right now. Okay, Martha, thanks very much.

This transcript has been automatically generated and may not be 100% accurate.

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