Analysis of "7"

Alright, I've spent a good hour or two listening to "7," getting all the lyrics down. Some parts I recognize-- the second excerpt is from Genesis' "Get 'Em out by Friday," the next from Coheed & Cambria's "The Willing Well," and the next from Mastodon's "Colony of Birchmen." But that next part, and the bookends... they're familiar, at best. It was hard to get the second-to-last one, but I've tried my best.

"They're breaking through...
They're breaking through...
They're breaking through...
Now we're falling.
We are losing control.
This is an announcement from genetic control:
IT IS MY SAD DUTY TO INFORM YOU OF A FOUR-FOOT RESTRICTION ON HUMANOID HEIGHT.
I hear the directors of genetic control
Have been buying all the properties that have recently been sold,
Taking risks oh-so-bold.
It's said, now that people will be shorter in height,
We can fit twice as many in the same building site.
They say it's alright.
Beginning with the tenants of the town of Harlow,
In the interest of humanity, they've been told they must go!
Told they must go..
No one runs faster than you can,
No one runs faster than you,
No one runs faster than you eat,
Into the end with you, into the end with you.
Run, run,
With, with,
Death.
Run, run,
With, with,
Death.
White faces coming closer with every step.
Earth envelopes, taking breath without happenstance.
Carve my teeth out, ripping through the sheep's head curse.
This is the regret that you make.
We're still connected.
This is the regret that you make.
I want my family back.
And there's something you take.
I'm sorry for you, but it's too late.
Mistakes like this, you don't make.
Don't you see anything?
You make some, and they'll get to you...
You don't love anybody.
I gave you money, I gave you a car, I took you in.
It's not okay, son.
But don't that mean something?
A little. No. You can do better.
That's the point!
The goddamn regret.
You deserve to die alone for what you've done.
The goddamn regret!
Don't deny it.
And I'll die.
Now I'll die!
The biggest regret of my life: I let my love go.
I'm your blood. I'm your family.
What did I do?
You're not my family, not anymore.
The fucking regret.
I'm your own flesh and blood!
What did I do?
You know.
What did I do?
They're breaking through...
They're breaking through...
They're breaking through...
Now we're falling.
We are losing control."

The second-to-last excerpt.. those lyrics bother me. Why was this sent to me, anyway? What does this have to do with anything?