Funny stuff. I should point out that the scenario did not require the Soviets (Red) to offer any warning prior to defending themselves against hostile action, or even how that hostile action might be defined or interpreted. The radio calls we offered were purely politeness on our part, lol. In any event, I think it is clear (and fairly defensible, as you seem to yourself admit) that, in the context of the rising tensions, missile craft approaching at 30 knots is pretty hostile behaviour.
Wow, we were more up against it than I thought at the time.
I assumed the Soviets would have restrictive RoE preventing them firing until they detected us doing so.