We are going towards a multipolar world order and Europe knows it. There is no going back and this is not just theatrics. The “defense spending” in reality is buying independence from US vassalization. They are purposefully not buying American and laying the groundwork for another alliance where they are not subjugated.

Since I am not really getting anything for free here: No, this is still not a moral argument. The argument is that the capitalists of Europe will seek return on this investment. Trump going away, and who is to say he is, is not going to change this materially.