Russia hit Ukraine with an ICBM containing multiple conventional warheads in response to the long-range strikes by the USA and the UK on its territory. The message is clear: next time, these might not be conventional warheads and they might not be hitting Ukraine.
However, the willingness of the Clown World leaders to risk nuclear war does tend to suggest that Big Bear and the other nuclear skeptics might be correct. What if they’re not crazy, they’re simply willing to blow the cover off the official story and allow the world to discover the nonexistence of nuclear weapons? That’s what Occam’s Razor would suggest, anyhow.