.
I define damaging, in this context, this way. In my opinion, Jessie Jackson is damaging in that his methods do more to perpetuate racism, racial divides, and racial hard-feelings than they do to eradicate it. He's further damaging because his following is much larger than that of the KKK, and he's taken more seriously by a larger segment of the population, not to mention the main-stream media. He's damaging because he has actually blackmailed businesses into capitulation with his false charges and media hype, something the KKK might have done 50 years ago, but he gets away with today. He's damaging because he seems to want to relive the 60s in everything he does. Jessie Jackson is damaging because he's given the aura of legitimacy, while the KKK is not.
They'll probably always be individual racism and race-based hatred, which is pretty much what the KKK is today; but Jessie Jackson continues to institutionalize it. Jessie Jackson is nothing but a Martin Luther King wanna' be, but he'll never be. The KKK of 1955 is not the KKK of 2005. Their torch has, for the most part, been extinguished; while Jessie Jackson, on the other hand, continues to fuel the fire of racism, and he does it front and center.
By the way, that cute play on words (Jesse really torques you, but I don't think he'd ever torch you) reminds me of the way Jessie Jackson, himself, plays on words. They might have clever ring to them, but are rather meaningless in reality.