I have no doubt that if someone had defended themselves or their property that the police would swing right into action to arrest them.
With what people and with what money?
The police of portland know with absolute certainty that the city government does not have their backs and are even hostle to them. The rioters attack them and threaten their lives, they serve people who treat them like scapegoats and trash. How many people will continue to protect people like that? This is a place that saw numerous numbers of officers quit and they are having problems finding replacements.
Portland is a shitty place to do business and who wants to operate in a city thats constantly rioting? Eventally those guys leave to which means less money for what few police are willing to remain soley for a paycheck a paycheck which is shrinking.
How many people you know that are willing to risk their lives for ingrates who hate them for a paycheck? How many people do you think would look at the guy who attacked you last week who tried to murder you last week getting killed by an angry mob and just drive on by?
Same thing has happened through out history, it just happened in Afganistan when the elite of a country are irresponsible, stupid and ungrateful the people with the job of defending them will just walk away and melt away and let the mob have them.