The other people in Putin's administration also have their own families and interests and wouldn't want that put at risk by nuclear annihilation. Even if Putin himself tried to give the go-ahead, I doubt those in charge of the nukes would want to effectively commit suicide over Putin's stupid invasion by firing them.
TMI operated safely and without incident for 40 years after the accident. An accident that killed nobody and amounted to little more than a poof of steam.
Because they can smugly claim to have accomplished something with their vote while the country burns around them. Must be nice not being at risk under a Trump administration.
Clearly you don't have a clue how international politics work. It's not unusual for world leaders to meet, even when some are dictators. Part of preventing war between hostile countries is diplomacy. I am not a world leader, so no, I would not be meeting with any of those individuals and neither should Stein. Do you seriously think it would be at all beneficial for world leaders to be assaulting each other?
It's black and white thinking and it's stupid. There's zero nuance to it.