I hate to defend such a despicable human being, but it’s a legitimate point: Not only does he have a right not to self-incriminate, he also has a right to hide his defense strategy against the crimes with which the state has charged him from the state.

(Note that I’m speaking broadly when I say “right,” in the sense that these are human rights that should be universally respected. The UK certainly doesn’t seem to respect the right against self-incrimination, given that it charges people with a crime for not allowing a border agent to rifle through their phone.)