I finally found the paper referenced at 18 minutes in her video (linked pdf below). One could spend a lifetime going through all the data at that web site. Main search page link is at top. I explored for hours and never found the rest of the papers she referenced. Not to say they aren't there but there are hundreds and maybe even thousands of them to search through. Searching these publications made my hair hurt. Soooo much info to digest.
https://www.start.umd.edu/publications
https://www.start.umd.edu/start/publications/research_briefs/LaFree_Bersani_HotSpotsOfUSTerrorism.pdf
The results below of JUST ONE SEARCH using the term "Terrorism and Violent Extremism" (without the quote marks). You'll see over 100 papers on just that one subject alone. Try a few other subjects yourself and see what Santa (Satan) brings you.
https://www.start.umd.edu/terrorism-and-violent-extremism
!! FOXTROT JULIET BRAVO !!