RE the point of humanism given by Amos: The fourth and the sixth, at least, are at loggerheads with fundamentalism. To the fundamentalist, all truth, and all valid solutions to human problems, are found in scripture (of whatever persuasion) and to condone any modification of that is heresy.
There is actually nothing there that says that anyone has to discard all the tenets of his "faith" out of hand; it justs asks that he be willing to subject them to "the light of day".