I am not so sure about spirited debate,

Well yeah in Trump's case, fair point lol

Would that be approved by the US?

Tbh, it's more likely than previous presidents. Trump has a track history of A) Being strongly anti-war, B) Letting the world know exactly his thoughts and intentions - which we saw live in front of the world with that oval office fight.

Now when it comes to the US government overall, that's an entirely different story and I'm not sure just how much one influences, or works around, the other. The USA has a long (perhaps entire) history of putting itself first:

First World War - American mostly sat around selling weapons to both sides, creating one of the most massive transfers of wealth ever known.

Second World War - Ready to extract even more wealth in the form of massive loans and and the sale of British companies for a dime a dozen. By the end the empire was eviscerated, cut to the bone, almost every penny sent into the wallets of the USA.

So yes, even when it came to the direct allies of the US, they were thinking about their wallets and resources above all else. Why would it be any different now?

So I do believe Trump is genuine, He more likely takes personal pride in being the anti-war guy, rather than empathetic reasons. But for the rest of the 'deep state' as they call it... who knows.