First, HRC has not blamed for the racism except for that which came directly from her campaign, namely Geraldine Ferraro and Bill Clinton. In neither instance did HRC take a firm stance against these outrageous statements.
Then, there are comments like these, from an unnamed Clinton advisor:
"If you have a social need, you're with Hillary. If you want Obama to be
your imaginary hip black friend and you're young and you have no social
needs, then he's cool."
Or the comments from Mario Cuomo:
”It’s not a TV-crazed race. Frankly you can’t buy your way into it. You can’t shuck and jive at a press conference..."
Then there were the Clinton campaigners that were spreading the lie that Obama was schooled in a Madrassa. Later, the Clinton campaigners released a picture of Obama in traditional Somali dress to the Drudge Report.
Even Harold Ickes played the "Jesse Jackson" card with Obama.
HRC also engaged in some pretty despicable attacks on Obama herself, though not all inherently racist.
There was the debate in which she demanded Obama reject Farrakhan after Obama already, unequivically "denounced" Farrakhan's antisemitism as "unacceptable and reprehenisible."
Later, she joined in on the phony controvery surrounding Obama's former pastor and friend, Jeremiah Wright, claiming "he would not be my pastor."
She also piled on Obama over another non-issue--that Obama and former Weather Underground Bill Ayers served on the same board of a Chicago non-profit. (Neglecting the role her own husband played in pardoning convicted Weather Underground members.)
She also openly mocked Obama's speaking style; hinted that, if elected, al Qaeda would strike the U.S.; made comments that seemed to support McCain; said that Obama's support among "hard working Americans, white Americans" is weakening; and much more.
Though Clinton has undoubtedly faced sexism and other attacks, none of them came from Obama or his campaign. In fact, Obama has been very dignified in praising Clinton. In fact, just today he said:
"Before we begin, I just want to take a minute to thank Senator Clinton
for the kind and generous support she offered on Saturday. She ran an historic race, a historic campaign that shattered barriers
on behalf of my daughters and women everywhere who know now that there
are no limits to their dreams. What's more, she inspired millions of
women and men with her strength, her courage, and her unyielding
commitment to the causes that brought us here today -- the hopes and
aspirations of working Americans."
"Our party and our country are stronger because of the work that
Hillary Rodham Clinton has done throughout her life, and I look forward
to working with her ... to make sure we lay out the case for change and
set a new course for this country."