Note: usually, a swig is defined as a large single gulp of a beverage from a container. But it can also be small gulps too. In the '70s with the 16oz Coke or Pepsi (RC or Double Cola) bottles and cans, the kid gulps we're usually small and often led to backwash!!!

It's a beautiful day in this neighborhood,
A terrible day for a n*gger.
Would he be mine?
Could I lynch him?...

It's a KKK day for my pal next door,
White Supremacy day, catch a n*gger.
May I pinch him?
Could I lynch him?...

I've always wanted a racist neighbor just like you.
I've always wanted to live in a neighborhood with you.

So, let's get the dogs out this beautiful day.
Me and Bull Connor, we might as well say:
Just do one thing,
Come on and swing
Won't you be my n*gger?
Won't you please,
Won't you please?
Please won't you be my n*gger?

Please furnish the OS as you offered. Btw, the 70s was a decade after the Civil Rights movement and legislation. In most places, the KKK wouldn't be visible anymore.

To the above: no, I distinctly remember the Klan in the news in the 1970s and even in California there was distribution of their paper from the National States Rights Party. It was called The Thunderbolt. That alone proves you wrong. As for the racist nursery rhyme here it is:

The bigger the N*gger
The harder they fall
But if you whack them in the head
BAM!
BAM!
BAM!
They sure as hell fall dead
Then there ain't any at all

The bigger the N*gger
The harder they fall
But if you shoot them in the head
BLAM!
BLAM!
BLAM!
They sure as hell fall dead
Then there ain't any at all

Next 3rd line would make a new substitute like stab them in the head and so forth with accompanying sounds with exclamation marks!

I have done some research leading to a May 1970 F.B.I. monograph from which I excerpted: "The NSRP has chapters or is active in the followlng states: Florida, North Carolina, Virginia, Kentucky, Tennessee, Arkansas, Missouri, Maryland, New Jersey, Ohio, Indiana, Illinois, and California."
The NSRP had minimal influence (approx. 150 members). Unfortunately, you were brought up in California in one of the very few overtly racist neighborhoods in the country.

Again, no. Some white people moved into my area that were from the South and who expressed racist views. However, I never even seen a black person in our neighborhood until I was maybe 8 (1972). There are no black kids in my school photos until 3rd grade and I didn't have a black friend until 5th grade, the year my dad died. Back then white parents usually didn't allow interracial friendships. There was no such thing as embracing diversity. That's just the way it was.

I'm very sorry to read that you were brought up in a de facto segregated community. Historically, one of the main arguments against segregation was that it was psychologically almost as damaging to whites as it was to blacks. I am white (really!) and I am thankful that I was reared with racial and religious diversity, and continue to live that way. I can't imagine not having the comfort of the black friends that I have had for so long.

https://youtu.be/97-UbvvWmqM