Democrat=Double Standard

Is there anyone out there who can defend the Democrats in Maryland who are using slave imagery to attack the republican canidate for the Senate? They are calling him an "Uncel Tom" and saying that he deserves it becuase of his Conservative beliefs. They are also pelting him with Oreos at political events. I can't believe that so many Democratic politicians are willing to condone this and even in some ways support it. I thought the Democrats were the ones who wanted to stop "Hate Speech". Please, if there is a reasonable Democrat out there, resond to this post.