>> The shape of an individual’s mental illness is strongly influenced by the dominant schema of the culture they’re living in. <<

>> No way, no how, should anyone foist the responsibility for these horrors onto isolated loners, whose ‘crazy’ beliefs just pop, fully formed, into their minds. <<

Well said.

>> We need to ask: “What’s wrong with us? How can we change for the better?” <<

As a collective us, yes, I agree. Which means each one person has individual responsibility for looking at oneself, and shares group responsibility for the communities in which each person lives/participates. (Bad sentence structure is bad, sorry, not sure how to clarify.)