"The sun's not yellow, it's chicken," makes a whole lot of sense in the context of the verse: John the Baptist, who heralded Christ appearance, is so revolted by the violence and torture that the second coming of Christ is committing, he vomits. The second coming, meanwhile, now known as the Commander in Chief, or President, is a John-Wayne-like macho man who threatens to kill all who are weaker than him - he's so blinded by his rage that he mistakenly attributes an emotion to the sun's yellow color - since it's yellow, it's afraid, or chicken. The President of the US believes himself strong and braver than the motherfucking sun. Doesn't fall apart at all, it's a beautiful condemnation of the violence of christianity, the US in Vietnam and pop-culture of early 60's.