You are applying false equivalency. The rioters and seditionists on January 6th sought to overturn a fair election by force of violence, by literally invading the capitol and threatening elected officials. Literally no left-wingers have done anything remotely similar in the entire history of the US.
As for your claims about the police, systemic racism is the reason why minorities have more contact with police. They are disadvantaged and marginalised and unfairly policed, because it's easier to beat poor people over the head than to do anything about white collar crime.
The US has a massive over-policing problem and it hits the poor and disadvantaged the hardest: https://www.nbcnews.com/news/us-news/half-people-killed-poli...
Defunding the police means for instance sending qualified professionals to mental illness calls, rather than armed police. No reasonable person could argue against this.
Regarding the right's belief that they are denied justice, that is just blatantly false. What they are "denied" is the taking away of the rights of others, which they continually try to do.