The threat to Rushdie was issued in 1988/9. Before anyone had ever heard the word "fatwa" or really understood there was an issue about depicting Islam in a fictional book. And that's all Rushdie did - write a book. I would hardly call that "bringing it on himself". The threat was real - we know because 3 or 4 translators of the book were murdered around the world. Rushdie himself was stabbed in the face at a book event in New Jersey 2023 - I was a couple of miles away, and the whole thing was shocking after all these years.
Harry killed Taliban. His choice to join the army and kill people. And his choice to talk about something no other person in the army thinks it is right to talk about - killing the enemy and describing them in dehumanising terms. His and his publishers' choice, made in 2023, after everything that has gone on in the years since 1989, after Charlie Hebdo, numerous major terrorist attacks, multiple wars. He's an absolute fucking arrogant fool who definitely has brought this on himself.
The notion that RAVEC would just allow a prince of the UK, the head of state's son to end up being murdered out of some petty revenge or whatever, because he and his stupid wife decided they didn't enjoy royal life or whatever it is he is claiming, is utterly ridiculous. None of the people making the decisions want their decision making to end up in a high profile death, because it will come back on their heads and on the UK.
Harry's principle issue is that he doesn't have what his brother has. And the reason he doesn't have that is his choice to live in the US. When he comes home, he is very likely to have what his brother and other members of his family have in terms of protection during ROYAL DUTIES. What he objects to is having to give notice (30 days) to get it. He probably resents having to tell them where he will be and what he is doing so they can make a security plan. He was always used to security trailing after him like servants and watching him get on with whatever dodgy and ill-advised behaviour he was engaging in his entire life before he left. He could do what he liked, when he liked and they would always be there. He can't have that now, but that is exactly what he wants.
The judicial review is not looking at the decision made. It's not there to tell RAVEC to make a different decision and it cannot do that. The JR is there to look at the decision making process and whether the process is rational and reasonable. As long as it is rational and reasonable, an outcome that Harry perceives is unfair to him is still a valid outcome. If Harry wins, all he wins is that whatever it is that he said in the closed session should be taken into account will be taken into account in another decision making process. The outcome of that process is not likely to end up as anything radically different to the process that has kept him safe in the UK for the last 5 years since he left, since I imagine the security services know more about the risks to Harry than he does, and will have been applying a dynamic risk assessment for the last 5 years, which is why he has never come to any harm.