I'm confused by this thread.

The protesters in this case were destroying company property on company land over a pipeline that was routed around a native American reservation.

It would be weird if the police DIDN'T warn companies/individuals about protesters planning on destroying property at other locations.

That's the police's job - to prevent crime. If the protesters were smashing cars in your neighborhood, I suspect you'd want the police to warn the residents there as well.

Innocent, everyday people being targeted ≠ massive oil company that is monetizing the death of the planet being targeted.

Argumentum ad populum

I'll just take Latin, brb