WASHINGTON (CN) - With the number of Islamic State group-inspired and directed terror attacks in the West on the rise since 2014, members of the House Foreign Affairs committee heard from experts Tuesday about the growing threat of extremism with recommendations about how to focus counterterrorism efforts.
During a hearing on the terrorist threat in Europe, experts explained to joint subcommittees how the threat differs in the U.S. and across the Atlantic.
More than 5,000 European citizens have traveled to Iraq and Syria to fight with Islamic State group, and up to 30 percent of them have now returned to their home countries, according to Seamus Hughes, deputy director of the Program on Extremism at George Washington University.
In contrast, only 250 Americans have gone or attempted to go to Islamic State-held territory to join the fight.
According to Hughes, IS supporters are not radicalizing in large clusters in the U.S. like they are in Europe.
"Unlike Europe, the United States does not seem to possess extensive homegrown militant organizations that can provide in-person ideological and logistical support to individuals attracted to IS," Hughes said during testimony, using an alternative abbreviation for the self-proclaimed Islamic State.
That said, the Islamic State group uses what Hughes calls "virtual entrepreneurs" to reach local recruits online and provide instruction on how to carry out attacks.
These virtual entrepreneurs have played a role in 21 percent of IS-inspired attacks in the U.S. and 50 percent of ISIS-linked plots in Europe.
Through interviews with several returnees, Hughes has been able to glean details about the Islamic State's recruitment process.
According to Hughes, one returned fighter explained that an IS wing focused on external plots had encouraged enrollment with presentations to Westerners that encouraged them to redirect efforts to build a caliphate to their home countries.
"The external plotting wing reportedly told foreign fighters from Western countries that they could better serve the caliphate by carrying out attacks in their respective countries," he said.
Despite its loss of territory, Hughes says some IS sympathizers still feel obligated to support the "beleaguered caliphate."
"This is one of the main factors that explain the wave of attacks, both thwarted and successful, that have hit Europe and the United States in recent months," he said.
While earlier American IS recruits were more commonly drawn to the fight because of atrocities carried out by Syrian President Bashar al-Assad, Hughes said in an interview after the hearing that more recent recruits are motivated by perceived religious obligations.
"This idea of a so-called caliphate was a driver for these folks," he said.
However, with the continued loss of its territory, the veneer of IS building a utopian society has been diminished.
"They're no longer talking about giving candy out to kids in Raqqa or electricity in Mosul," Hughes said. "They're more talking about military victories, and so you're less likely to get the random kid in Indiana interested anymore."
Global Islamic leaders have condemned and deconstructed the ideology of IS in no uncertain terms in an open letter to IS leader ‘Abu Bakr al-Baghdadi, but the group has been able to exploit Muslims who lack a strong understanding of their faith.