Has anyone who loves Obama researched his mentor(read his book) Mr. Marshall Davis?

Frank Marshall Davis, one of the greatest influences on the young Obama was a member of the Communist Party USA and also quite perverted in his views on sex. Was this just a bad choice of a mentor by Obama or is Marshall Davis living again through Obama? Who is this Barack Hussein Obama...do we really know? First, he could no more reject Rev. Wright than his own grandmother until the public heard the "God Damn America" rhetoric. Than, Obama could not jettison Rev. Wright fast enough. What is the public began to research his real mentor, Frank Marshall Davis? What would Obama do then? Who is Barack Hussein Obama?