What you might want to do is to ask the court to give you other property to compensate for his share of the debts. Debts are part of property division. Each item of property (or liability, like a debt) does not have to be divided 50-50. I'm not sure how much debt we are talking about, but you could point out to the court that he has expressed an intention to pay NOTHING, so to protect your own credit, you would prefer to take on the debt and receive other property in lieu of his share. That's completely doable, provided you have enough other property to offset it.