There is consensus (even by RFK Jr from what I hear in interviews) that vaccines confer good immunity to the population and help control serious diseases that historically killed or maimed millions of people.
There is also an argument RFK Jr. makes which is that the vaccine solutions contain many harmful components other than the actual vaccine and these components are responsible for many harmful outcomes due to their presence. These harmful side effects should not be considered acceptable and there should be work to eliminate these harms because they are not really acceptable.
However, these positions seem to be routinely headlined as being anti-vaccine. They are not. The argument is anti-harm and that seems to be something people would normally support. Only through misrepresentation of his comments do people come to believe he is against vaccines and he should be "rightly maligned".
His interview with Jordan Peterson was very interesting, especially as it did highlight some of RFK Jr's blindspots on politics. Worth taking time to listen to the whole thing even though it is quite long.