So, the document includes "some" terrorist attacks overseas. That might increase the numbers of foreign born terrorists.
So, the document looks at those convicted of "international terrorism-related charges". So the domestic mass shooters are not included. So a terrorist attack on a US target is specifically NOT included. That might lower the percentage of "American born" vs. "foreign-born", right? I mean a terrorist attack IN America, BY an American is not included...
Sounds like somebody is cooking the books.