So, I guess we'll just have to completely disagree, because although Rossi was threatening, I don't think IH thought Rossi was seriously stupid enough to sue them.
Having watched Rossi from a distance for several years, this kind of miscalculation on Rossi's part was not that surprising to me when it happened. But I do suspect it was a miscalculation, in the sense that I suspect Rossi was expecting IH to buckle and possibly settle. Or, if not a miscalculation exactly, perhaps something along the lines of a hail Mary.