That was in 2002, when it looked like after years of cold war U.S. and Russia can finally become good allies. That was before U.S. along with a group of other (mostly NATO) countries invaded Iraq in 2003 without any mandate in U.N. and which Russia has opposed to and before the invasion of Libya in 2011, before U.S. carried out Arab Spring in 2010-2012 and before U.S. carried out colour revolutions, especially Rose Revolution in Georgia in 2003 and... Orange Revolution in Ukraine in 2004.

It is not a secret at all that U.S. carried those out and then it became quite clear that U.S. installs marionette regimes here and there and one of the places was... Ukraine.

Right after all those Russo-American relations going up, up and up merely some years ago.

Russia didn't like being stabbed in the back at all.

You can't really bring non binding, non serious agreements that were never put in writing or ratified and that all parties declared no longer relevant back from the dead and feign moral outrage. That's ridiculous.

What does "legally binding" do good at all? There are no other laws other than the rule of the strength.

U.S. was strong for a long time. It did whatever it liked.

Now Russia restored some of its strength to the point it can show others that sometimes you have to listen to when a bear warns you (quite calmly and nicely first).

For one, if it is ratified in a democratic nation that means that the people had a say in it through their elected representatives.

That way the other party knows that this agreement has some backing and staying power.

Not some dude spouting some ideas to counterparts during very very turbulent times.

Who decides if a nation is democratic or not?

Many people (even Americans) claim U.S. is not a democracy. Every country has corruption to some degree. The only backing and staying power there is - is the force a country has and its willingness to use it to defend something.