The FDA link concludes there is "no evidence of harm from the use of thimerosal as a vaccine preservative, other than local hypersensitivity reactions" and "he evidence was inadequate to either accept or reject a causal relationship between thimerosal exposure from childhood vaccines and the neurodevelopmental disorders of autism, attention deficit hyperactivity disorder (ADHD), and speech or language delay".
Also, "The various mercury guidelines are based on epidemiological and laboratory studies of methyl mercury, whereas thimerosal is a derivative of ethyl mercury. Because they are different chemical entities - ethyl- versus methylmercury - different toxicological profiles are expected. There is, therefore, an uncertainty that arises in applying the methylmercury-based guidelines to thimerosal".
"Of note, all hepatitis B vaccines for the U.S., including for adults, are now available only as thimerosal-free or trace-thimerosal-containing formulations. In addition, all immune globulin preparations including hepatitis B immune globulin, and Rho(D) immune globulin preparations are manufactured without thimerosal".
"California researchers proved in 2009 that having an HIV-weakened immune system can significantly boost risks for other cancers as well, particularly those linked with viral infections like hepatitis, human papillomavirus, and Epstein-Barr. "
Be careful saying vaccines or HIV drugs cause harm. The evidence is not there about vaccines, but merely posited. The HIV drug is a potential cause of cancer. However, HIV makes one more susceptible to several cancers in general.
I am not an anit-anti-vaxer, but I am also not one to cast aspersions based on theories or plausible abilities.