Reading back:
if the presence of antibodies to a pathogen means immunity to that pathogen ...( the basic principles of how vaccines are supposed to work).. why doesn’t the presence of supposed HIV antibodies = immunity to ‘HIV’
Ah, not so simple.
Antibodies work well against some pathogens. Less well against others. I've worked with one of those pathogens for which a high antibody count meant illness and likely death with no treatment. Because high antibody levels were the wrong response. Our bodies are not perfect machines.
On HIV, for a while, the immune system does keep HIV in check, but not for long. The virus replicates very quickly and recombines at a very high rate. That means that it generates antigen diversity very quickly, to the point that it it basically evades and tires out our immune system. And keeps killing CD4+ cells.
There's low CD4+ counts that are on the grey area between what are considered normal values and low values, and very low CD4+ counts that are not seen at all in healthy individuals (or not for long, as they encounter pathogens).
There's at least another example of a pathogen that is deadly and keeps evading the immune system by generating a new antigen coat, thereby the body generates antibodies but it keeps facing new antigens that it's not prepared to fight. I'm sure you know all about it, Cath. 
Getting back to the topic of vaccines, it hasn't been possible to develop vaccines to all diseases, such as most parasites and Dengue virus for example, because a simple antibody response is not always the most effective way to fight a pathogen and we may not acquire a lasting immunity.
Giving the benefit of the doubt, it's perhaps easy to think that anti-vaccination and anti-germ theories are mainstream because they are presented in more appealing manners. The overwhelming body of work done on vaccines and pathogens is more boring, but it's also a lot more impressive than the same half a dozen people who never actually worked on the subject but keep popping up as so called "experts".
A PubMed search of "vaccin*" gives 370 thousand hits. That's almost 400k articles on vaccines/vaccination.
"HIV" gives similar numbers.
A lot more than a handful of websites or "experts" that can be named. Don't anyone dare pretend that vaccines and germs as causes of disease are anything other than established and consensual among the serious and widespread scientific community.
And, no, don't fucking quote Kary Mullis (the same guy over and over) again.
Some of you might find this funny. It's about Nobel Prize winners.
www.cracked.com/article_18638_4-nobel-prize-winners-who-were-clearly-insane.html