Apparently, the Russian legislators think more of their country than ours.
Russians are and always have been realists, not idealists. It’s how they’ve lasted so long, same as the Chinese. Besides, like the Chinese, the Russians are a Byzantine culture and smile in the light and dance in the dark. Their politicians play politics like chess with a mixture of Twister (do you remember that game?) and it takes a lot of work to successfully penetrate Russian culture and understand it fully, much like China.
Russians, before they agree to anything, buy time and work like fiends to create a backup plan or some sort of fail safe to go to if they change their minds or to get themselves out of it if they realize it won’t work in their favor.