From the Los Angeles Times article, "Portland’s anarchists say they support racial justice. Black activists want nothing to do with them":

The election of Biden has only antagonized the anarchists — and exposed their differences with the Black activists they claim to support.

Black activists and community leaders, who generally view the defeat of Trump as an opportunity for change within the system, said the anarchists are hijacking the movement and undermining the push for racial justice by continuing to commit violence.