The question:

In the song Yankee Doodle, we ask is it the horse or the feather called "macaroni"?join or dieth

My Shadow questions - why would either horse or feather be called "macaroni," a pasta?

Thanks to Wikipedia:

Yankee

"Yankee" was a derisive term to refer to Northerners, specifically the Union side of the American Civil War. https://en.wikipedia.org/wiki/Yankee

Yankee Doodle

The song originated from British military officers to mock disheveled, disorganized colonial "Yankees" during the French and Indian War. British troops liked the song because it created a stereotype of the Yankee oaf trying to look stylish by putting a feather in his cap. Americans added additional verses in turn to mock British troops.
The song was popular during the American Revolutionary War (1775–83). Adopted by American patriots after the battles of Lexington and Concord. [https://en.wikipedia.org/wiki/Yankee#Yankee_Doodle

Macaroni

The Macaroni wig was an extreme fashion in the mid-18th-century England. A macaroni (or maccaroni) was the term for a fashionable fellow. Maccaroni's spoke outlandishly and dressed characteristically of indeterminate sex as an "epicene," completely un-gender-biased. The term referred to a man who "exceeded the ordinary bounds of fashion," men who adopted feminine behavior, demeanor, or dress; androgyny – having both masculine and feminine characteristics. A macaroni dressed with long curls and spying-glasses, powdered wigs with chapeau bras on top.

These young men developed a taste for Italian maccaroni, a type of pasta little known in England at the time and as a result were said to belong to the Macaroni Club. All things fashionable or à la mode was referred to as "very maccaroni". The Italian term maccherone, figuratively means "blockhead, fool."
https://en.wikipedia.org/wiki/Macaroni_(fashion)

Doodle

Doodle first appeared in English in the early seventeenth century, derived from the Low German word "dudel" which meant to "play music badly", or Dödel, which meant "fool" or "simpleton".
Dandies were men who placed particular importance upon physical appearance, refined language, and leisure hobbies. A self-made dandy was a British middle-class man who impersonated an aristocratic lifestyle. They notably wore silk strip cloth, stuck feathers in their hats, and carried two pocket watches with chains—"one to tell what time it was and the other to tell what time it was not"

The full version of the song, as it is known today Yankee_Doodle

"Yankee Doodle" is the official state song of Connecticut.
This is only the first verse.

Yankee Doodle went to town
A-riding on a pony,
Stuck a feather in his cap
And called it macaroni.

[Chorus]

Yankee Doodle keep it up,
Yankee Doodle dandy,
Mind the music and the step,
And with the girls be handy.

My Shadow Opines

On the surface, the song Yankee Doodle Dandy was homophobic chest-beating intimidation practiced by each side accusing the other of being effeminate "girly men,"https://en.wikipedia.org/wiki/Girlie_men with feminine traits, but deep-down the lyrics reflect the ongoing struggle with class conflict. https://en.wikipedia.org/wiki/Class_conflict