There's nothing more fantastical, and chaotic, and destructive, than a world without any plumb line of principles, because all that leaves you is the shifting sand of the ever-changing, arbitrary will of men.
But if that's what you want, go for it.
Just don't act surprised when a different, totally contrary, whim strikes the Donald's fancy, next week, or next month, or next year.
But, I'm guessing that you'll probably be right there defending him, in spite of his incoherent inconsistency.
Your fantasy world. Sometimes it is not possible to apply anything that could reasonably be termed a principle.
What is our 'principle' concerning the rights of the people of Tibet to self-governance? Such as examples are endless.
Sometimes the US can follow principles in foreign policy and often we must live with the practical realities of the world. It benefits no one to live in a fantasy world.