His views to me are not abhorrent, the are simplistic. He seems to be lumping people into two groups. One group who believe that man has to struggle to overcome his bad nature. Otherwise, you believe the external forces cause people to do bad and evil things. Where do you put the people who believe that some people are born with the capability to commit evil acts and others develop it later in life?
In my opinion, you don't have to have an absolute view of morality to understand absolutism or even be effective dealing with people who think that way.
Even though you can glean from his writings the point about the absolute values of the religious terrorists we are currently fighting, other writers have made that point more directly.