Alarmist nonsense. Members of Congress submit lists of people they are meeting with in order for these people to be vetted. Members of Congress are targeted just like any other elected official. Capitol Police intel analysts looking at PUBLIC information in order to complete a threat assessment is SOP.
The Capitol Police cannot win in this situation. If a Member goes to an event and is accosted or assaulted by someone, people will say "why wasn't this person vetted?!" So they are damned if they do, damned if they don't.