Clearly, Salman Rushdie wanted to go home and participate in this festival. I don't think he had any other motivation than that, although there are some people who might use such a thing as blaming the police for a bit of publicity.
It's a curious thing, the rule of law. You know it when you have it. You know how it feels to live in a society that has the rule of law. And then you know when it's gone, and when it's gone, it feels like anything can happen at any time and no one can stop the police or the government or anyone with an agenda. Several billion people around the globe don't know what one day under the rule of law feels like.
Does Rushdie even need the publicity? Does he need to invent such a thing? Or does he simply want to go home?