If police unions side with other government unions against the taxpayers, we'll have a dynamic leading to CW2.
I believe that the 'if' portion of this statement transitioned to 'already done' some time ago. Unfortunately for us all, they have made a terrible choice - for them and for us. I don't doubt that there are many LEOs who are sickened by the travesty that the rule of law has become. But many of those who are perhaps sympathetic to the cause of liberty will have also arrived at their own calculus of survival and self-interest. And it won't include the protection of those who need it most.
How much compliance do we owe to law enforcement agents whom we can no longer trust? That's the difficult question that we will all have to answer. And in that answer lies part of the recipe for CWII.