"All that has changed since the west is the land of innocence is..."

[Tellem Chaho]

Hello, I'm working on some novels written by Kurt Vonnegut and while reading James Lundquit I fell on this sentence: "all that has changed since the west is the land of innocence is Vonnegut's feeling that innocence is dangerous"
I have tried to understand this statement in many perspectives and in many ways but still can't make sense of it. What do you guys think of it?