Furthermore, the lexicon defines most of these extremists as people who would commit violence. The DHS definitions basically state yeah you have the belief but you are willing to act in a violent way to enact your beliefs. These are definitions of risk assessments.
Here's an updated lexicon if you feel like reading a dictionary in table format
Oldest source that I could find is from 2013, from this website. Image itself is referencing the 2009 lexicon.
https://globalwealthprotection.com/proliferation-profiling/
Furthermore, the lexicon defines most of these extremists as people who would commit violence. The DHS definitions basically state yeah you have the belief but you are willing to act in a violent way to enact your beliefs. These are definitions of risk assessments.
Here's an updated lexicon if you feel like reading a dictionary in table format
https://www.dhs.gov/sites/default/files/publications/18_0116_MGMT_DHS-Lexicon.pdf
One would think that antifa fall under many of these definitions.