"I totally agree with that, though many people obviously feel that is there right and the police should let them vent or be hostile."
I think this is perspective projection.
Just because people feel that DEATH should not be the outcome in any situation where the civilian does not immediately comply with police orders does not mean that these same people are anti-cop.
Police are humans, just like all the civilians they encounter - they are going to have good days and bad days. But police are in the position of authority (complete with badges and guns that they can shoot people with) and because of this position they are - and should be - held to a higher standard when it comes to interacting with civilians.
When a cop pulls you over for a missing front license tag or some other similar minor infraction (as in Sandra Bland's case), can they really expect the person being pulled over to be in a calm and peaceful mood? NO. As such, the police should then EXPECT at least a little bit of annoyance and petulence would ensue from the driver....
GOOD cops do anyway - and they deal with the person professionally and issue the citation and move on....
BULLY cops use this an excuse to abuse their position of authority... with DEATH being a viable option for any resistance - as long as the officer in question can state that 'they were in fear for their lives'.
That threshhold is a golden ticket for abuse.