Putin acts like "it's a game of lies that can be played from both sides". The grave difference is that from Russian side there is direct military involvement and seems like Putin don't understand it's not the same thing.
He understands everything.The reality is as follows: Putin is driven by global perspective as the gatherer of the Russian lands and his logic is very close to the maxim “the end justifies the means”. Laws, sanctions, isolation, etc. are all temporary things, but the Crimea is to be Russian for generations to come. So, people, economy, army are just chess pieces in the game and really don’t matter too much. I can probably quote some nice Nekrasov’s lines to show what we should expect.

[Pусский народ]
Вынесет все - и широкую, ясную
Грудью дорогу проложит себе.
Жаль только - жить в эту пору прекрасную
Уж не придется - ни мне, ни тебе....