There were no good intentions....
Fake quote that has been repeatedly debunked
Blacks were already voting Democratic and LBJ lost much more than he gained by passing Civil Rights......A Democratic South
Despite the cheesy smear attempts by the northeastern liberal democrat establishment and its media, now parroted by right wingers, Johnson was always doing a little something for black and latinos from the beginning in the 1930's, when it cost him votes, like finding money to pay Prairie View A&M teachers and emphasizing English only in latino schools as a teacher during the Depression; he also aided 'Progressives' as far away as Washington state and others, not just in Texas, and was one of the few administrators of FDR's projects that made a success of them here in Texas, putting a lot of people to work. No votes in any of that for him in 1930's Texas, or for Sam Rayburn.
As for the Civil Rights bills, they wouldn't have passed at all without his strategic plotting, and many of the clauses had Sunset provisions in them as well and many only applying to 7 southern states; it was actually Nixon who made them nationwide and permanent when they came up for review in 1970. Northern states like New York and 'liberal' states like California got to keep their literacy tests, with the results that Harlem's voting turnouts barely beat Mississippi's. He also opposed turning AA into a quota system, as did Humphrey and Moynihan, but the radicals won on that and got them under Nixon as well. Nixon gave the black radicals everything they wanted, which led to their disasters today of failed cities and failed education systems, not Johnson.
Hugh Davis Graham's excellent history.
The Civil Rights Era, covers it all in detail, bill numbers, dates, commissions, committee rulings, etc. along with a couple of his other excellent books; if you haven't read it you don't know squat; he spares no one any slack, liberal or conservative.
And I'm on record as being all for literacy tests and civics tests as well; it's been over 50 years in some case since black and latinos were handed their own school systems and city govts. to run, so if they still have literacy and dropout problems they're self-inflicted, so fuck them. Nobody gets to make up their own facts, right or left. Both ends of the spectrum need to find somebody else to hide their propaganda rubbish under, and tha includes the military and CIA's own lying and arrogance creating the problems due to the perceptions re Viet Nam as well.