there is no race “Arab”. THe Arabs are an ethnic group. The COLB that Obama’s people posted on the internet doesn’t claim that his father was NEgro. It says “African’ which is also not a race. THere are generations of white people born in Africa who could also be called AFrican.
Everything you say is true, I’m just speculating that his actual birth certificate probably contains embarassing entries, or at least entries he’d find embarassing.