Blame Johnson a little too. His pushing through Kennedy's civil rights agenda made large sections of the country hostile. They were democrats in that day, but their descendants turned republican and altered the narrative from full blown racism to hating government empowered to "socially engineer" outcomes, etc.
That's a very important point that gets overlooked all the time. Conservatives scowl every time their position is accused on being covertly racist, and yet it is the frustration of traditional racist and sexist and privileged ideals and behaviors that has spawned and fueled this virulent neo-conservative hatred for government "intervention".
(Unless, of course, that intervention is protecting or enforcing their bigoted, self-serving agenda. Conservatives are all for government intervention when it's denying women the right to contraception and abortion, and denying gays the right to marry whom they choose, and denying the poor access to health care and food stamps, or it's spending trillions of dollars and millions of lives forcing "democracy" on other nations at gunpoint.)