Yep, the KKK, just like pretty much every "militia group", regardless of racial views, is well represented by FBI and other undercover LEO among their members.
The KKK is so tiny it is completely insignificant on a national, or even a regional level. "Neo-Nazi" groups on the other hand are mostly organized crime, aka gangs, whose primary activity is distribution of narcotics, meth, and other illegal contraband. They're not out there lynching, burning crosses or rioting. The white identity is required to survive in prison, where many of them spend a good portion of their lives. Are they racist scum? Sure, just like black gangs, who are just as racist. But no one calls them "Black Supremacist Groups".
well said