<<He meant that the Voting Rights Act was not what opened up the two party system in the South.>>
No, I thought he meant that LBJ was wrong in predicting the loss of the South for a generation. But plane himself could easily clear up what he meant.
<<Observe that when the GOP had majority control neither the civil rights nor the voting rights acts were repealed.>>
Yes, and why didn't the white Southern racists who fled the Democratic Party in reaction to the Civil Rights legislation and were then captured by the Southern Strategy, walk out on the Republicans?
Some of them did, into fringe Third Party movements. But why did racists like Thad Cochran, Jesse Helms and Trent Lott stay with the GOP? Probably because they were realists who knew they had no place to go. Under the old system of Jim Crow, the country was becoming ungovernable, with riots in the streets, Freedom Riders being killed and crippled at the hands of white racist Southerners, people demanding freedom and equality being attacked with dogs and firehoses in the streets of American cities for the whole world to see, student strikes and a huge international black eye that the country could no longer afford. So the Republican Party, if it meant to remain a national party, could no longer associate itself with the old brand of Southern racism, at least not publicly. A whole new language of codes had to be developed if the GOP could maintain even a subliminal connection to the White South. For realists like Cochran, Helms and Lott, it was a no-brainer: how many times can a man switch parties and retain credibility? Where else was there to go? And, finally, better to stick with a party that still works under the table for white racist ideals than return to one which has fully embraced the concept of black-white equality.