@chuck47 I truly believe that a lot of people lost respect for police officers because of what they see through all the forms of media. Be it someone's personal experience that they share on their socials or the large media outlets.
The above stated, If people just learned to control themselves and give benefit of the doubt to the PO's that stop or question them and give a little respect, they'll likely get that in return from the authorities. Yes, depends on the situation in question. But most cases. What I do see very often is people resisting to comply or keeping things to some civil level. Then, often than not, it escalates into something that could have been avoided. I mean, there's plenty of videos! Check YouTube too.