Not much legwork required when quoting people from BLM protests directly; incidents this summer and as far back as 2015 when the movement first gained prominence. It’s not all that strange that an extremist group like BLM would feature instances of violent rhetoric caught on tape at anti-police protests.
By that logic, any extremist rhetoric can be excused for lack of a successful counter narrative. I don’t see the utility of employing that approach here. I don’t fault you for being unaware of people from other ethnic backgrounds being killed by police. National media tend to focus on a particular group."...influenced by the BLM movement and their belief that law enforcement was targeting blacks"
While that is indeed a narrative I am not sure it's a false one, can't recall an incident as of late where a white person was killed by law enforcement while getting arrested. And when did being influenced become equivalent to being incited?
A bit further down (read the whole 'Chill Wind' paragraph for better context):
"Without law enforcement and elected officials providing an alternate narrative, assailants developed a distrust of law enforcement and felt emboldened and justified in using violence against police"
Seems it doesn't really matter if there is a narrative against law enforcement or not - the lack of a pro police narrative appears to be the problem.
Sure; Trump supporters alluded to as an extremist insurgency of sorts by the press are a regular feature of today’s coverage.