They're probably not doing high enough doses and/or a combination of the following:
Using LSD with intentions to not be bigoted, prejudice, etc.
Taking LSD with the intention to introspect, experience spirituality, etc
Taking lots of medium dose LSD over time (years, decades) till the character of the experience gradually evolves for them in such a way as to reduce bigotry and prejudice
When people say LSD can have profound effects on people what often gets left out is that one may need to take it more frequently and in higher doses than most recreational users tend to do. Intentions matter, too.
Using LSD with intentions to not be bigoted, prejudice, etc.
Taking LSD with the intention to introspect, experience spirituality, etc
Taking lots of medium dose LSD over time (years, decades) till the character of the experience gradually evolves for them in such a way as to reduce bigotry and prejudice
When people say LSD can have profound effects on people what often gets left out is that one may need to take it more frequently and in higher doses than most recreational users tend to do. Intentions matter, too.