Over the past year, a Muslim leader in north Texas, Imam Omar Suleiman, has risen to prominence on the national stage.

At the age of just 29, Suleiman has already earned a reputation as a leading voice for “moderate” Muslims, both working towards religious unity with Christian leaders and loudly condemning the beliefs of Islamic extremists.

As CBS DFW reports, however, word of Suleiman’s work seems to have reached well outside the U.S., as well — so much so that terrorist group ISIS has called for his assassination:

It was in early March that the imam says he first learned of the threat on his life, when the FBI called him to inform him of a video that ISIS had posted on YouTube.

That video, which has since been taken down, included images and interviews of New Orleans native Suleiman, urging ISIS followers to “Kill the imams of the disbelief.”

As founder of the Yaqeen Institute — “whose mission is to combat extremists and deepen understanding of the religion” — the video makes it clear that the 29-year-old is a prime target.

It also makes specific reference to the imam’s relationship with First United Methodist Church Dallas Pastor Andrew Stoker. The two are long-time friends who have publicly sought to lead by example by showing that they “accept each other in the fullness of our traditions and fullness of our identities.”

Christians like Stoker are considered “infidels” by the terrorist group, with an ISIS group in Egypt proclaiming just in February that it considers “followers of the cross” as its “favorite prey”:

While the FBI is unable to comment on the details of any ongoing investigation, former FBI Deputy Director Buck Revell has left no doubt just how seriously the bureau takes such threats, which he says are more commonplace than most think:

“Certainly we’ve had enough attacks here in the United States to know there is a capability … The majority of people who are attacked in the Muslim religion are attacked by other Muslims.”

If the terrorist group, true to its name, hoped that its threats would frighten the Texas imam into submission, it seems to have had the opposite effect.

Despite the calls for his death, Suleiman makes it clear that he’s as committed as ever to his fight, saying that terrorist groups like ISIS have “hijacked” his religion, and “that their venom needs to be condemned.”