Frankly and only truth
This all depends on where in the USA you live.
If you live in a big city of 1 million or more the police are usually quite hostile because their jobs are more dangerous there and this tends to stress them out. Normally however if you are polite to them they will act professionally towards you.
If you live in a smaller town of 100 thousand or less the police are normally quite friendly and polite.
What do I think of them? I think they have a job to do. I think it is a hard job and not for everyone.
I always try to keep all the laws, obey all speed limits and traffic laws, pet license for my cat, etc. I never have trouble with the police.
Where I live when I take my cat for a walk after midnight sometimes the paranoid neighbors will call the police. The police have always been friendly to me especially when they see the cat and the pet license hanging from the cat's neck.
Most people with cats are flagrant about NOT getting pet licenses.
My cat has a pet license however.
I am lily white and 50% German, 25% Greek, and 25% French Celtic.
Negroes normally have a very bad habit of running away from the police, and this triggers a chase response in the police the same as if you tried to run away from a dog or a mountain lion or bear. Then you are going to get tackled and handcuffed.
Never run away from the police. Always stand your ground and be polite and answer all their questions.
Latinos have a habit of running away from the police anytime they cause a car crash. Even if the car is registered to them and they are easily traceable later. But they usually get away.
Ergo Latinos run faster and better than Negroes.
Q.E.D.