Democrats and their supporters in the media have been denying the Antifa violence wherever it has occurred.
As far as Seattle, here is a description of the boarded up buildings in downtown from Cliff Mass, a professor in atmospheric science at local university. NPR canceled his weather segments because he bluntly pointed out the results of violence and lack of police presence:
What didn’t I see on my two-hour walk? Not a single police officer. Not one police car.
A boarded up central core of a major U.S. city was being left to the homeless, drug dealers, and security guards. Even the most notorious, crime-ridden corner of the city had no police. The streets of the city had become a fearful abandoned place.