ooops...I left out something important. There is NO way that the virus is only as old as the late 70's. The mutation rate points to the virus being ~80 years old. There was HIV in the US in 1968, it was in England and Norway in '59. Kinda hard to engineer a virus that already exists, huh?

And lastly, GENETIC ENGINEERS DO NOT CREATE, THEY MODIFY. If your proposal is that HIV was engineered, there have to be parent viri. No plausible parent viri have ever been proposed.