I was reminded of the book and its argument the other day while watching David Simon's HBO miniseries Show Me a Hero, so I wrote a blog post about the connection: http://jasonlefkowitz.net/2015/08/show-me-a-hero-and-the-lim...
I don't think it's a coincidence, for instance, that Paradise Lost reads so cinematically.
Maybe modern mass entertainment does have a larger effect, but I wouldn't take it as necessarily true. A little set design and presentation wizardry and a willing audience can fire the imagination in major ways. See: otherwise seemingly sane people joining ISIS to fulfill their role in a religious narrative. Usually if someone credits mass entertainment media for their violent acts, they were unbalanced loonies to begin with.
Finally, it's not clear that your last sentence really tells us much about the nature of altruism. What can't be turned into a matter of faith by someone whose business is selling faith?
Scientific altruism places faith in innovation. It can allow us to ignore reality, assuming someone else will fix things.
We should aspire to be scientists in our own lives. Not accepting conclusions at face value and working to improve understanding for people beyond ourselves.
[1] http://yudkowsky.tumblr.com/post/103192100330/cognitive-trop...