As a nation, what’s stopping us from saying the following?

“Ok, you say this is about defending Russia’s security interests. Fine - let us move out as many Ukrainians as wish to leave, and in return we will sign a treaty saying that there will be no EU or NATO expansion into Ukraine, and we will lift all sanctions. Furthermore, we will supply Russia with the technology required to decarbonize and save Earth from the looming methane clathrate die-off.”