In Lord of the Flies what does Piggy's speech reveal about his understanding of life on the island?

Piggy goes to castle rock with the intention of demanding the return of his stolen glasses. When he is standing on the causeway he makes a speech. His obvious intention is to try and persuade the boys that it is better to act sensibly and try to get rescued than to behave like savages. Unfortunately Piggy fails to appreciate how far removed from civilised behaviour Jack's tribe have become. As a sort of miniature adult Piggy has no understanding of how the minds of boys work. He speaks to Jack's tribe as if he were an elderly school master chastising a class full of naughty schoolboys. This simply infuriates the boys, who probably see themselves as brave savages and hunters. They object to be lectured to by a fat boy who they don't even like, let alone respect.