The appropriate pronoun is whom, in this case.
This statement is ironic because they ARE a crowd of kids.
Piggy is angry because they are acting like kids, but they are kids. Piggy expects them to act more maturely than they are capable of doing.
It is statements like this that contribute to Piggy's being an outsider. He continually places himself "above" the others and criticizes their behavior, much like an adult would.
To
follow him and his word, because it’s known that he is the path we shall follow, his way is the only path to the promised kingdom if we follow
B. It would emphasize important details and delete irrelevant ones.