I don't want to spend too much of my life troubled by little things like this, but the assumption that rioters haven't been arrested at other riots is wrong. For instance, approximately 250 people were arrested during the Kenosha unrest. More than 1000 have been arrested in Portland, etc.
Of course, rioting is different than protesting. But assembling in a public square in downtown Portland without a permit is different than assembling in the U.S. Capitol--after breaking through security. Not all protesters--and protest locations--are the same.
Oh--and conservative counterprotesters brought weapons to Kenosha and one of them actually shot protesters on the other side. He was acquitted, as I recall, of the charges against him, but even before then he was hailed as a hero by a significant portion of the right wing community. That kind of thing, and the overt reference to "second amendment rememedies" may be why political protesters on the right have a more violent reputation than the left.
Rioting is rioting; violence is violence, but I haven't seen significant public figures on the left lauding the rioting in Portland, Minneapolis, Kenosha, etc. Maybe that's because of the blinders I wear?
Finally, the suggestion that a black person can commit violence and get away with more than a white person runs exactly counter to the evidence.
https://www.ussc.gov/research/research-reports/2023-demographic-differences-federal-sentencing;https://www.washingtonpost.com/news/wonk/wp/2017/11/16/black-men-sentenced-to-more-time-for-committing-the-exact-same-crime-as-a-white-person-study-finds/;https://pmc.ncbi.nlm.nih.gov/articles/PMC10321492/ Now, police violence against black people
does get more attention than police violence against white people. However, it doesn't take reading much history to understand why that might be.