U.S. Holocaust Museum guard Stephen Tyrone Johns became the latest victim of rightwing violence when he was shot and killed today by white supremacist James Wenneker von Brunn.

Johns' murder follows Kansas ob-gyn Dr. George Tiller and Pittsburgh cops Eric Kelly, Paul Schiullo, and Stephen Mayhle, all victims of rightwing hate.

When will the most prominent rightwing voices - politicians and talk show hosts - firmly denounce rightwing violence and hatred?

The Pittsburgh Post-Gazette reports,

Accused cop-killer Richard Poplawski spent hours posting racist messages on an extremist right-wing Web site, decrying blacks and Latinos and warning of forthcoming economic collapse fueled by the "Zionist occupation" of America, an expert in political extremism has determined. Earlier, he had praised the "AK" rifle as his ideal weapon.

It was an AK-47 that police say Mr. Poplawski used to gun down three Pittsburgh police officers who arrived at his house Saturday morning in the midst of a domestic dispute.