My brother is one of these.

We both had exactly the same middle class upbringing. Loving parents, decent schools, holidays etc.

He’s gone down a rabbit hole of conspiracies. Chemtrails, faked moon landings, you name it, he believed it.

He was fucking irritating but his nonsense wasn’t actually hurting anyone. However now he is trying to convince my nephew that vaccines are evil and they’ve decided to home educate my niece.

Its all stuff hes been exposed to on the internet.