HELP PLSS ITS ABOUT TO END SECTION A

P1. I am speaking to you about our Wrath of Grapes boycott.

P2. Because I believe our greatest court, the court of last resort, is the American people. And I believe that once you have taken a few moments to hear this message, you will concur in this verdict along with a million other North Americans who are already committed to the largest grape boycott in history.

P3. The worth of humans is involved here.

P4. I see us as one family. We cannot turn our backs on each other and our future. We farm workers are closest to food production. We were the first to recognize the serious health hazards of agriculture pesticides to both consumers and ourselves

What is the main claim in this part of the speech
How does this claim develop the central claim of the speech?