Russia tends to rattle the sabre when things are tough for them.
I am guessing that things aren’t going well for them at all.
This Russian idiots need to remember that a US nuclear sub tied up at Gibralter about 2 or 3 weeks ago. Its nuclear missiles can travel 7,000 miles. Moscow is only 3,000 miles away from Gibralter. I wonder if these guys have been told this by their military or political intelligence? I presume that Putin knows this which may be why he has only talked about tactical nukes.