I think it’s pretty likely that he is smart enough to try and use “madman theory” to gain his advantage. Whether that plays out to be a good strategy in the long term remains to be seen. However, in the past it has worked to a degree when leaders have utilized it.

I didn't really mean he is doing it on-purpose, 4-D Chess style. Just a thought, he could be achieving the opposite of his desires, and by accident helping Europe?

If Trump does accidentally manage to unite Europe, have them end the Ukraine war, and all without US involvement and spending… he will of course immediately claim full credit.