A'isha
Tolerating some humor can be a cost-effective component of a program of behavior control. So what? Rushdie wasn't telling Mohammed jokes.
The Rushdie case is also interesting because it illustrates that victims' responses to threats are variable. Christopher Hitchens openly supported Mr Rushdie, and declined advice to keep quiet about doing so. Visible public defiance can be a tactically effective response to threat.
Another source of variability is exposure profile. Mr Jillette cites his family as a security exposure. On information and belief, his family includes two minor children. Children are a special concern in personal security planning, because an attack against them can occur at any time during their lives. Meanwhile, they cannot give informed consent to the overt acts which may place them in jeopardy.
Bottom line, credible threats of violence can reduce the prevalence of behaviors that the threateners wish to inhibit, at low cost compared with other methods to encourage compliance. As with so many other things, however, lower cost often accompanies lower effectiveness. It is unreasonable to expect that a low-cost approach will eliminate non-conforming behavior.