If your suggesting they actually use them, what would be the target? This was a counter insurgency war, that lacked high value targets that would justify the use of nukes. The political ramifications would be enormous. The United States, EU, China, Japan, and most of the rest of the world would be shocked. Tensions between the Soviets, NATO, and China would go off the chart, putting everyone on a hair trigger. The people living in the Warsaw Pact Countries might launch mass protests. The most severe sanctions would be imposed on a weakening Soviet Economy. In 1979 the West Germans told the Soviets if they invaded Poland it would mean the end of Detente. This would rise to the same level of escalation of force that would demand a response.