re: There will be blood

No, it's not. It's a cautionary tale about the evils of pursuing earthly treasures while abandoning all characteristics that make us human beings (feelings, compassion, etc.). Plain view was an extreme character that only showed compassion twice in the movie that I saw. One was rescuing the kid and the other taking in a vagrant who he thought may have been a real connection to a life as a human being long forgotten. He shuns the kid and kills the other. At that point, he knows his opportunity of being human is gone.