Scheuer's list of policy changes is headed by a change in policy toward Israel, a country he condemns as a "theocracy in all but name," characterized by "arrogant racism." He also makes it clear that he sees no reason for the U.S. to continue supporting any of its non-European allies against takeover by bin Ladenism: "For our own welfare and survival, we must 'watch others die with equanimity' and help after 'the flames burn themselves out' by focusing our overseas intercourse on trade, sharing knowledge, and donating food and medicine."
Of course, this might be a quote taken out of context, but it seems clear to me that he's putting it delicately that yes, we should end aid to Israel and not interfere if (when) the Arab world takes that opportunity to obliterate it.
The book doesn't have policy advice. It's got debating points for the American people to think about and decide.
I think it's worth reading and thinking about, if you're willing to think about things from a point of view you may find disturbing.
Many people prefer to only read things they agree with. If so, you probably won't like the book at all.