If this is in Portland, the cops and the rest of the power structure couldn't give two sh*ts about ANTIFA's threats to Americans'
It was that way in the Democrat controlled South as well. Raise it to the state AG level and Federal civil rights protection as necessary.
Klantifa is a nationally connected group as is their funding.
Make sure the family is secure and armed first. Then sneak out the back door and follows these a-holes to their place vehicle and find where they live. A 3am wake up call standing over them while they are in their bed should fix this nonsense quickly. Just make sure you have a good alibi like you were at home playing on your phone. Don’t ever take a phone or vehicle with you where there is a GPS signal attached to it.