Again: "That" was said to an old man on his 100th birthday, was never Party policy, and was never enacted as such.
What Johnson said was to convey his reasoning of a strategic Party policy. It is exactly the reasoning that I explained to you earlier, just without the unnecessary slurs. Wouldn't you agree?
Just as a reminder:
“I’ll have those n---s voting Democratic for the next 200 years.” – Lyndon B. Johnson
"It's human nature to support someone who gives you free stuff. It's also human nature to slack off when your basic needs are provided for. The Democrat Party has exploited these human traits and focused them on blacks; this strategy has been much more successful than their past initiatives (slavery, segregation, terrorism) at destroying black families." - Damn Yankee