i really wish the United States would pull all troops out of Europe. Fuck Europe and let them protect themselves
One thing you don't understand is that the US didn't keep troops and nuclear weapons in Europe just to protect Europe.
It also did that to control Europe. By having nuclear weapons hosted in Europe, it prevents the EU from becoming a major nuclear power.
The USA's former policy is that they wanted a strong Europe, but not a self sufficient Europe. Otherwise, Europe would set it's own course, in a lot of military matters.
If the USA alienates Europe, Japan and other allies, that means they will seek other alliances.
For example, ever since Trump started to impose huge tariffs in Europe, Canada and Japan, the result has been that these countries have started to get closer to China.
Even Japan, with it's long history against China, has made recent deals with China, because they are seeing the US as being an unreliable partner.
One thing that you might not understand, and Trump is too dumb to comprehend, is that the US is the world's biggest exporter of security. Not just for Europe.
And in many ways, it has allowed the US to benefit in political and economic matters all around the world.
For example, because the US was the main security guarantor for Saudi Arabia, it meant that the US had a saying in what prices SA would price it's oil.
It also allowed the US to call in a lot of favors in international matters. Another example, if the USA wasn't such a close ally to the EU, during the invasion of Iraq and Afghanistan, most EU countries would have denied getting into that war, along side the US.
Another example, is how the US can convince Taiwan to boycott China with their chips.