Look at the big picture: - The US have pushed allied away (nobody trusts the US anymore, and I don't know which country would count the US as an ally today) -

Look at the big picture: - The US have pushed allied away (nobody trusts the US anymore, and I don't know which country would count the US as an ally today) - The US have humiliated Ukraine and are destabilizing Europe (some of those ex allies) - The US have threatened ex allies (including Europe, again) militarily - The US are threatening partners (those ex allies) economically In the last 2 months, the US have gone on a way to change most of their allies into enemies at an unprecedented speed. Why should the US contribute to helping Europe against Russia's expansionism? In a world where the US have allies, that's obvious. In a world where the US want to be alone, it's less clear, but I would argue that destabilising Europe is not good for the economy, and hence for the average american. It's only good for the US oligarchs who are now running the country.