That's a weak argument and you know it. Blacks would have voted for whoever had a 'D' next to their name and, in fact, supported Hillary over Obama in the beginning only shifting over to Obama when he started to look electable. Remember Obama being criticized by blacks for not being "authentically" black because his ancestors were never brought over as slaves?
Black support of Obama was not by default. Hillary had blacks in the beginning.
And Hillary would've hammered Obama over eligibility, reminding voters that, "It's sadly unfortunate that our Constitution, written by slave-owners, doesn't allow for such a fine, brilliant man like Barack Obama to aspire to the Presidency." You think Hillary would've passed that up?
And what about Keyes' Senate run? Obama was already being groomed for a future presidential run during Keyes' ill-fated contest. Keyes could have, at the very least, forced the issue. He didn't then. Now it's suddenly important?
McCain, Palin, Bush, Cheney, Rice, Limbaugh, etc. The roster of conservative voices silent on this issue starts at the very top and goes on from there. To embrace this conspiracy is to accept a whole laundry-list of convoluted arguments, each one falling perfectly in place for such a monumental ruse to succeed.
It just didn't happen.
What you miss is black turnout was larger than ever...Inspired by a black Presidential candidate of course
We have pre-election voting here and Blacks showed up more than I ever saw before