With all candor, and without a rascist bone in my body; since Obama is from Kenya, the only Revolution to which he could even remotely be connected, through his late father, would have to be the Mau-Mau anti-colonialist revolution which took place OVER THERE.
It’s not required to prove your eligibility based on the male line of ancestry—descent on the maternal side is perfectly acceptable to join the SAR or DAR.