The real reason a very loud few are posting hostility toward Barack Obama at DU:

[dionysus]

177. i don't see much racism from legit DUers, but what i have seen is, there are a bunch of DUers who

were hardcore, stone DLCers to the bone, but when Obama got elected, they suddenly became Kucinich style ultra liberals overnight, because on DU you are only supposed to be allowed to criticize Dems "from the left" (this was during the era of mods, not juries, so if you were popping off dissing Dems and it wasn't coming from the left, your posts got deleted or you got tombstoned. with the jury system, anything goes). Die hard Clintonites who now denounce the Clintons from the rooftops.. I couldn't put an accurate number of how many, but it's a good handful of people. For them it's not really about policy, but rather a continuation of old grudges. Presidential primary seasons on DU get NASTY.

In many ways the primary wars of 2007 and 2008 never ended. if you were on DU at the time you'd know what I mean.

that is not to say that this scenario applies to every detractor, nor that all detractors are jaded Hillary supporters, nor that there aren't real reasons to be critical of some of the things Obama or his administration has done. but there are some old grudges still alive today here.