I think hes on a downward spiral and at risk of premature death just like his mother.
If it does happen all the current events will be raked over constantly in the press like just after his mums death.
But in the end it will be his own fault, though that's not the appropriate narrative after someone dies. You can't really say it was their own fault.
Same with his mum, you cant talk about how certain actions of hers led to her death.
Its seen so many times with people who are addicted to drugs or alcohol, making bad decisions for themselves.
In the end all the family can do is leave them to it and hope they come back to their senses before too much damage is done.
If he is attacked by fanatics now, it will be his family ( Royal Family) who will be blamed because they didnt provide security. There will be no blame put on Harry.