If it is connected to the destruction of Romulas, what if he found out that Starfleet had deleberately caused it somehow?
That's what I am thinking. Maybe Section 31 detonated some type of bomb inside the star to cause the Supernova? I could see Section 31 wanting to destroy Romulus, the homeworld of a key rival to the Federation. It would be the perfect way to cripple an enemy of the Federation in a way that looks like an unfortunate natural disaster.