This is what bullies do especially governments run by bullies. I hope and expect that President Biden has quietly let the warmonger Russians know that turning Kyiv into a "giant melted spot" would be met by the US declaring that it's the equivalent of Russia directly attacking us (Poland etc) and that we would of course turn Moscow into a "giant melted spot" in return.
Russia’s Medvedev threatens to turn Kyiv into ‘giant melted spot’
Moscow on Saturday threatened to reduce Kyiv to a "giant melted spot" if Ukraine is allowed by its allies to use Western long-range missiles to strike targets deep inside Russia.
The threat by Dmitry Medvedev, deputy chairman of Russia’s Security Council, came as the U.S. and the U.K. are deliberating giving Kyiv permission to use Western weapons to attack strategic targets farther into Russian territory.
Medvedev, who likes to rattle nuclear sabers, said the Kremlin already has "formal" grounds to use nuclear weapons after Ukraine's cross-border incursion into Russia's Kursk region, but could instead utilize newer technologies to create a "giant melted spot" on the site of the Ukrainian capital.