He is a kook, and if he is connecting vaccines to autism, he is a liar and any data he is sharing shouldn’t be trusted. He might be right here, but not a trustworthy source. Data is plentiful, no need to stoop to this guy.
Well, he is right here and that is the issue. So, whatever issues you have with him, aren’t relevant to the subject being discussed. He isn’t a ‘kook’ regarding this issue.