Progressives have the blood on their hands of a record high number of police officers killed in the past year.
What makes you think its "progressives" that are responsible for the death of U.S. police officers?
Most crimes have nothing to do with politics, and I see no reason why "right wingers" are any less capable of committing a crime than left wingers. (Actually, the greatest source of domestic terrorism in the past decade has not been from left wingers and/or islamic terrorists, but from right-wing extremists.)
Actually, looking at the statistics, the most common cause of death among officers in 2021 is not shootings or other types of violence... it was Covid-19, and given the fact that MAGAchud are more likely to be anti-mask/anti-vax/anti-social distancing (and thus more likely to transmit the virus), I'd have to say it is the right wing that has most "blood on its hands".
https://www.odmp.org/search/year/2021