PORTLAND, Ore. – Somali is the third most spoken native language in Portland’s public schools.

And the city’s largest Muslim group is taking aim at President Donald Trump’s ban on travel from countries with terrorist ties, the Associated Press reports.

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Portland’s roughly 8,000 Somalis are concerned that Trump’s executive order Monday banning new visas from countries rife with terrorists will have a negative effect on the growing population, particularly those working to bring relatives to America.

“It’s very, very negative, very concerning. We don’t understand why this community is targeted,” Musse Olol, president of the Somali American Council of Oregon, told the AP. “And those of us here, those of us who’ve been here for 35 years, are being alienated, demonized.”

But attempted terror attacks by Somalis in Portland and similar events in other cities involving radicals from the six predominantly Muslim countries included in the president’s travel ban makes it clear exactly why the temporary precautions are necessary.

According to the AP:

A local Somali-American named Mohamed Mohamud was arrested in 2010 for plotting to bomb a crowded Christmas tree lighting celebration in the city’s town square. Mohamud, a former Oregon State University student, was sentenced to 30 years in prison in 2014.

There’s been numerous others.

Six Somali refugees were arrested in Minnesota in 2015 for plotting to join ISIS, The Washington Times reports.

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Last year, shortly after the 2016 election, 18-year-old Somali refugee ran his vehicle into a crowd of students at Ohio State University before getting out of the car with a butcher knife to continue the attack. Eleven people were injured before police ended the assault in a hail of gunfire.

A machete wielding Somalian also attacked patrons of the Nazareth Restaurant and Deli in Columbus, Ohio in February. The attacker injured four people before police killed him, as well.

In both of those cases police believe the men were motivated by their faith in radical Islam.

Fox News reports:

Just two months later, another Columbus resident of Somali descent was indicted after he returned from Syria where he trained alongside terrorists and was discovered to be planning an attack on a U.S. military base or prison.

Abdirahman Sheik Mohamud, a U.S. citizen originally from Somalia, wanted to “kill three or four American soldiers execution style,” according to his indictment from April. Attacking the prison was part of a backup plan if that didn’t work, the charges said.

Mohamud, 23, of Columbus was charged with supporting terrorism, supporting the same terrorist group and making a false statement involving international terrorism when he allegedly lied to an Ohio FBI agent by saying he was in Istanbul when authorities say he was in Syria.

Regardless, Portland’s Somali leaders are concerned that Trump’s travel ban is demoralizing local immigrants, and allege it will only encourage more who are already inside the U.S. to join up with radical Islamists.

“This will make it easy for (young Somalis) to say, ‘Well, we don’t belong in this country,’” Olol told the AP.

“With the radicals on social media … now you’re pretty much reinforcing what they’re saying,” he said. “That’s one of the tools they use to recruit young men, and we’re more susceptible because we’re the poorest group of Muslim immigrants.”