The conservative base was badly burned by our experience -- our abject, costly, humiliating failure -- in Iraq and Afghanistan.
They were wildly enthusiastic about the invasion of Iraq (with a few exceptions, like the people at AntiWar.com, and Pat Buchanan's American Conservative). And the sent their sons and daughters to fight.
It seemed like The Good War (WWII) all over again. Not only would we kill those Islamists, but we would bring democracy and development to the oppressed masses of the Middle East and Central Asia. We were back in the role of the Good Guys again.
And we could watch it on YouTube! Puff the Magic Dragon putting down 105 shells among scuttling infra-red illuminated jihadi's... the perfect way to wage war.
And ... after 20 years ... Iraqi's killing eachother, the rise of ISIS, scandals over stolen money, over our gallant allies in Afghanistan who kept ten-year-old boys chained to their beds for sex ... and our utter, total defeat in that country.... with Iraq moving into Iran's orbit.
So now there is a visceral recoil among the conservative base when asked to put more Amreican treasure, and maybe blood, into wars for democracy in places that they could not find on a map. ... for a country whose president says he wants to join the New World Order, and against a President whose real crime, in the eyes of America's Left, is that he has forbidden homosexual propaganda in his nation's schools.
But there is no deep committment to, or understanding of, what our new foreign policy should be. Should we continue to try to be world hegemon, like the neo-cons want? Or isolationists? Defend Taiwan? Should we continue to have several hundred of our military active in "Africa Command", when we cannot even command a street corner in South Chicago?
It's a discussion we need to have. The Republican tops are, of course, in favor of business-as-usual, and are supporting Mr Biden and the neo-cons as they fight their war by proxy with Russia.
If we don't come to a deep understanding of what our foreign policy should be, it will just be more of the same.