By its literal definition, civil disobedience cannot be violent or destructive. It is a peaceful breaking of a law–and acceptance of the consequences of breaking that law–in order to bring attention to injustice.
"When elected officials tolerate violence...they undermine what a century of civil disobedience has taught us. Civil disobedience is a peaceful breaking of a law–and acceptance of the consequences–in order to bring attention to injustice.."
What about the violence in Portland and Kenosha, ask Trumpists? Here's Gregg Hurwitz's answer in The Bulwark