Again, there are crimes of terroristic threatening and such that fit. No need to police the thoughts. With apologies to my friends in blue, there are also "enhancers" for attacking a policeman. I'm sorry, but my father is just as important to me as your father the cop is to you. Attacking either one should have the same punishment. Not exactly the same issue, but similar. What we are punishing is the crime, be it assault, vandalism, murder or any other crime. Leave the thought policing out.