No one in his or her right mind thinks this kind of behavior advances anyone's cause. Even so, no one should be more alarmed by it than those in the campaign of President Obama, as they watch representatives from one key demographic constituency treat a representative of another so disrespectfully.
Of course, for that reason among others, this video will never see the light of day in the MSM. It's obvious that the reaction would be very, very different were this video of a Tea Partier harassing the same man.