Eh, they're tactical weapons. They're also still "russian" despite Belarusian deployment. The only protection they have or need is the joint policies of escalation and "Use it or lose it." If any Western country decides to have a go at them, they'd probably try to use them before they could be destroyed and Russia would almost certainly escalate to tactical nuclear attacks against both Ukraine and whoever tried to strike the Belarusian deployment. At which point, over the course of 15-60 minutes, we end up in a situation where something like +90% of all the world's nuclear weapons both tactical and nuclear will be launched, even when neither the aggressor nor target is directly involved. Fortunately military planners have known and understood these issues for the better part of a century, so we won't be seeing some random NATO state screaming YOLO as the lob missiles at the new location of russian nuclear weapons just because they are somewhere new. This is just more posturing and nuclear sabre rattling from the impotent russian regime.