The American Prospect has a good article on racial discrimination against Obama. I feel strongly that blatant forms of disrespect and outright violence directed against Obama have less to do with his policies and more to do with white angst about economic insecurity and latent feelings of racial superiority.
This is not to say that all who disagree with Obama's policies are racist.
Civil disagreement is part of the democratic process.
However, we are witnessing a degree of disrespect and symbolic violence that is truly unprecedented and hints at fascism.
I am not happy with many of Obama's policies so my position that he is subject to such violence is not based on blind allegiance.