I don’t see why we should care. Libya is nothing to us. And Russia is not actually able to expand and hold foreign lands.
For about 100 years the US has been getting into wars which we should not get into. I grant that fighting Japan after Pearl Harbor made sense. The rest of it? Those wars have helped the elitists but hurt the country. Libya? Ppppffffffttt!
For many many reasons we should care. To not care would be a mistake.