Why don't we do more?

Folks there is a very simple reason the United States and NATO have not gotten involved militarily in Ukraine. I completely support the Ukranian people and I support supplying them with weapons and money but putting troops on the ground would cause a nuclear war. It is very apparent from reading his speeches that Vladimir Putin is completely unhinged and he would launch the nukes if we actually put troops in Ukraine, in a matter of hours nearly 100 million people would die. Millions more would die within a few years from radiation poisoning, cancer and the ensuing famine caused by the nuclear winter. So we cannot do much more than hit him with sanctions. I do agree we need to cut off the oil and gas trade with him but unfortunately it is winter and Europe gets nearly all of their heating oil and gas from Russia so they really can't cut it off completely until they can secure another source without causing thousands to potentially freeze to death. Unfortunately the really scary part is that he won't stop at Ukraine, unless we can convince Finland and Sweden to join NATO quickly he will go after them next, before turning his attention to countries to his south. I don't think he will attack a NATO member because let's face it that would be suicide. Unless he is sick and dying and has decided to go out in a blaze of glory.