There is no "biological case" against race. Dobermans, Golden Retrievers, and poodles are all the same species and undoubtably interbreed far more often than European-Americans, blacks, and Asians do - but anyone who's been around dogs much knows that all three breeds (races) of dogs are markedly different both physically and mentally.
Or has anyone forgotten the O.J. trial - at which his black-led legal defense team argued that DNA comparisons had to be made to the same racial group?
Or what about racially-linked genetic diseases - such as sickle-cell anemia?
It is time to tell the truth!
"Or has anyone forgotten the O.J. trial - at which his black-led legal defense team argued that DNA comparisons had to be made to the same racial group?" Your citing Johnnie Cochran as an authority? I can't imagine a weaker argument.