This man missed 4 phone calls. It doesn't mean he breached his curfew. That's not even a serious violation. He has been on bail without breaching for 3 years so the Judge obviously considered the fact that he does appear to abide by his court orders. The breach of probation charge could be something simple and not serious such as failing to keep the peace. It could be a simple mistake. Just because he breached his bail and probation doesn't mean he is any more dangerous. It doesn't mean that because he breached his bail and probation that he's alleged to have committed two separate offences. Failing to keep the peace is a breach that an officer lays any time someone on probation picks up a new charge.
In addition, he has previously only expressed aggression and anger towards family members and relatives, not anyone from the general public, so I do not think he would be a danger to the public.