Numerous foreign-born individuals have been convicted or implicated in terrorism-related crimes since September 11, 2001, including foreign nationals who entered the United States after receiving visitor, student, or employment visas, or who entered through the United States refugee resettlement program.
The failure to use statistics here is noteworthy. I found this in the FBI's archives.
Here is that source: https://archives.fbi.gov/archives/news/testimony/the-terrorist-threat-confronting-the-united-states