you are only thinking of the Klan as a political organisation dedicated to racism. What you aren’t taking into account is that the organisations you mentioned have nowhere near the hold over their communities that the Klan at it’s height managed to maintain and they are not nearly as capable of campaigns of organised and sustained terror.

Now we just have the modern police. And maybe the police happen to be staffed with the exact same people who were formally in the Klan, but I assure you that this time its going to be different.

The US both now and then has structures dedicated to ensuring that people who use institutional power and violence to suppress black people and other minorities get away with it and are rewarded. The difference is the presence of an organisation dedicated to making use of this to wage guerrilla warfare and conduct terrorist campaigns against the black community.

How is the modern Saint Louis PD engaged in conduct materially different from the Klan era? What about the Baltimore PD? Or the Chicago PD? Or the Dallas PD?

To compare the capitol riots for example with the operations of the Klan in Mississippi in the 60’s is ludicrous.

The capital riots were only able to occur because the police were in on it.