I'm not sure he's left a lot to come back to.
He's not so much burned his bridges but vaporised them.
Honestly I'm baffled by H&M.
They left M's father in no doubt about the personal consequences of speaking to the media for financial gain yet seem unwilling to live by the standards they set for others.
Of course they are entitled to do and say as they wish, make their money how they please and live in a way they find "thriving".
I can also simultaneously believe that whilst privileged, H's life was not always easy, I can understand why he feels resentment towards his family for some aspects of his upbringing.
In addition I can also think that whilst M thought she could live within the RF, the reality of it was unbearable - it's not a life I would choose - and had far less freedom than she anticipated.
As for the RF, they are what they are. Far from perfect but certainly in public (though in private who knows?) they have handed out olive branch after olive branch to H&M - only for them to pick of the fruit and fly off again, leaving their mess behind.
It's a sad situation all round.
I don't know if H coming alone is the best solution or one of the worst and even for whom.
Frankly, I don't think there ever was an optimal outcome whilst trust is so strained lacking on both sides.
If this rift is ever to heal it's going to have to start with H&M making a decision to move on and stop making any further revelations.
Given the book deal H has (and the potential for M to write her own) I don't think that's going to happen and in that situation, I can fully understand why members of the RF are not willing to participate in being "copy" in those next chapters by welcoming them back into the fold, preferring instead to keep them both at arms length.