I’d have to refer you to places like Southern Poverty or law enforcement to identify specific sponsors of terror.
I believe that, in the United States, prosecutors, law enforcement officers, and congress are the ones who decide what warrants investigation, generally speaking.
If you think your law enforcement should decide which political speech is terrorism, you have many home countries to choose from -- from the U.K. to Saudi Arabia -- but the U.S. is not one of them. Best of luck!
Are hasbara organizations stochastic terrorist in nature? Someone told me they exist to distract from settler-colonial violence against Palestinians.
Who should get to decide which warrants investigation?