I can read that, it says: "The problem is that Egypt's economy was falling way before that happened. Unless oil-rich Arab states foot the bill (no evidence that they were going to do that), then Egypt will have to make peace. Sadet's motive for negotiating peace was that the war was simply costing Egypt too much money. By 1990, I don't (I think its don't, might be do) think Egypt has any choice but to accept Israel's peace terms."
It makes more sense as don't. It also would mesh well with what Jasen seems to expect as the outcome of his scenarios.