It has nothing to do with whether the attacking organism is a virus or a bacteria ~ the question concerns the cell receptors both the virus and bacteria use to gain access to the cell. Without that receptor, neither get in.
Bacteria do not need to "gain access to the cell". Most proliferate interstitially. you may be referring to the toxins generated by the bacteria - endotoxins and such.
Further to the HOOEY quotient of this baloney - most north americans are from euro descent - any such immunity would have travelled across the atlantic conferring some degree of AIDS "immunity" along with it.
No, this is all hogwash.