No, we don't know that.
Historically it has been violence that stopped violence, and crime (like toppling an unjust government, breaking segregation laws, etc) that stopped crime.
>People should use modern tools to reduce racial issues. Like voting or social media’s, never burn a state property.
Yeah, they've tried blogging about it. There are also tons of books on the matter, vlogs, articles, etc. They voted Obama twice. Didn't work.
A few months of angry riots and a few burned down police departments though, could send a very clear message to politicians and police chiefs, and help change laws to restrict police abuse.