There’s no law, practice, treaty or alliance sacred to them.
All that's missing now is for you to explain in what respect the Russian leadership, as described above, is different from the American one. Just with the JCPOA in mind...
Of course, treaties are being kept (by both sides) as long as it's in both sides' interest for the treaty to remain intact. If it were in the U.S. interest to keep that treaty, any reasonable diplomat would have told you it's mandatory to sit down with the other side and work out the differences in light of both sides' (!) security interests. Including walking the extra mile in THEIR shoes... Issuing an ultimatum is how a mob boss goes about business. And speculations are, as Bolton does his dirty work, the New Start Treaty is next on his list. That's when global annihilation will be on the table.
But yeah, something is "gnarling [you] about Russia".