>because I told him there's the posibility that autism isn't a single thing
I highly doubt that he told you to kill yourself because you said this and exactly this. Either you said something different, or that this scenario did not happen at all, or that you are leaving some details out. This resembles a strawman. Obviously autism is not a "single thing." There is a spectrum representing different autism diagnoses. My brother has what they presently call high functioning autism but it used to be called aspergers syndrome for him. In-addition, there is overlap with autism spectrum and ADHD. Nobody has claimed to solve the autism enigma or has deduced the actual cause. People who claim that they have figured out its cause are grifters.
Andrew Wakefield is a quack. His "study" had eleven participants (a ludicrously small sample size) and he manipulated the data to better support his preconceived hypotheses. There was a more recent study conducted in Denmark that involved at least three thousand children which could not replicate his "results." But is it any wonder that people who sell vitamin supplements, essential oils, and homeopathic remedies just happen to be antivax and support Wakefield? Perhaps you should reconcile how every socialist country widely promotes the use of vaccines. There's no profit motive there.