I'm old.
I won't be in power forever.
I want to be remembered.
Fuck it, nuke 'em!
A not unreasonable concern for anyone to have. The world has been facing and considering much the same for months now.
Whatever the outcome, it shows what a clown putin is. If that is the plan it is likely nobody will be left in that scenario to remember him - cf MAD. If it isn't the plan then why did he suggest nukes in the first place?
Only a clown would behave like that.