You just contradicted yourself. You quoted him as saying “The US never signed any agreement with Russia regarding NATO expanding to east” But then claim the documents are literally publicly available? And now you just admitted there isn’t a signed document? So you lied. He said signed agreement and you implied there was one but now you admit there isn’t. This is the point no one signed an agreement. For most of History nations and empires and leaders knew If you wanted to make your case for breaking something you got it on paper in a treaty. If not then it’s just verbal statements which isn’t the same as the nation agreeing to anything

Invading? The eastern block nations applied to join.