[1rudeboy]

As much as I dislike Russia, I don’t see how a treaty made with a different and defunct country (the U.S.S.R) applies to them now.

The Soviet Union's successor (Russia) simply has to announce it is withdrawing from the Treaty. Yet it has not, meaning that the treaty is still in effect.

[SecondAmendment]

For those who have commented about this, I have found some scholarly research which seems to support my assertion that a treaty lapses when a country ceases to exist:

http://digitalcommons.wcl.american.edu/cgi/viewcontent.cgi?article=1216&context=auilr