Anti-vaccine, anti-tylenol, stating that circumcision causes autism, stating wireless 5G damages DNA, stating that vaccines are part of a anti-black conspiracy, hiv/aids denialism, believing that contrails are actually chemtrails, etc etc etc.
Link to autism comments: https://www.cato.org/blog/circumcision-tylenol-autism-rfk-jr...
Misc including 5g comments: https://www.forbes.com/sites/saradorn/2024/11/15/rfk-jrs-con...
Obviously I feel like he should be providing his sources.