Resistance isn't immunity. It's possible there are some people with innate 'resistance' to rabies.

"HIV, untreated, is very deadly, but not nearly as deadly as rabies."

You might want to look up the definition of deadly. They both lead to death at a high rate - HIV at 100% eventual fatality and 99.9+% for symptomatic rabies. Again, pre and post exposure treatments for rabies are much more effective than for HIV. HIV has a higher fatality rate and less effective pre and post exposure curative treatment. It's pretty easy to compare 100% to 99.9% and know which one is bigger.