I have absolutely no doubt the USA winners will be amend to wear (most likely) a stetson - as they do at USGPs.
Also, see this, from another place:
The garment is called a 'bisht' and it is an outer garment worn in predominantly Arab countries. The name is derived from the Akkadian word bishtu which means 'nobility' or 'prestige'
This garment is considered a symbol of great honour. It's a status symbol amongst royalty, the wealthy and those with high social rank, much like a cross between ceremonial graduation robes or, in Western terms, wearing a black tuxedo at a special occasion.
When it's the Emir of a country literally gifting you the bisht, putting it on you with his own hands, it's the highest honour that can be bestowed upon that civilian.
It has nothing to do with religion at all.
Messi may not have understood what it meant when he graciously wore it, but it was the Qatari way of recognising him for the GOAT that he is.
So yeah: inappropriate, poorly timed, and against FIFA rules (but when did they matter?), but not, of itself, offensive. Quite the reverse, and unlikely IMO an attempt to ensure 'Arabic symbolism' was the primary motive, otherwise the Emir - and Infantino - would've gatecrashed the trophy lift photo, no?
I like it. What is it?