This was pretty interesting, thanks for sharing that!

Thank you, Magdalena, for these good reminders.

Too, it can be the negative lessons that set a person resolutely on the path to Faith.

The public primary school would set aside a day for each of the grades to take over the cafeteria for an hour, and we'd eat turkey that resembled styrofoam if we were lucky but more often resembled cardboard. Half the pupils were told to dress up as "Indians" and half the pupils were told to dress up as "Pilgrims". We had to make our own costumes. I remember one year on the "Indian" team, I repurposed my Brownie uniform, it had to have been the year I aged out of being a Brownie into the green uniform of the regular Girl Scouts. I put some yarn fringe on it and that complied with the teacher's instructions.

What did it wasn't the food or the silly costumes. What did it was realizing much later that feminists of the [tribe], whether actual or adjacent allied, had us dress up anachronistically and inauthentically either as Plains natives or as Mr. & Mrs. Quaker Oats in order to meet some curriculum mandate for experiential-performative pedagogy about a historically-questionable founding myth. Aha, another piece of the puzzle fallen into place.

If this childhood experience sounds totally foreign because you were homeschooled, then that's one more reason to be thankful that you were homeschooled!

BTW, Squanto was Catholic. What he taught the Pilgrims about farming came from what he was taught during the years he lived in Europe.

Now in the era of instant internet queries, a keyword search of "Catholic" and "Thanksgiving" together doesn't readily surface the links telling us the real story in the Americas as in the OP. Instead, the search results are about eating leftover turkey tomorrow, practically moot for CINOs since the "Ordinary Time" Friday abstinence requirement got discarded.

Next year on Martinmas (November 11th), roast a goose, bake a blackberry pie, and serve up this fully Catholic feast with new Saint Martin's wine. For the little ones' entertainment and learning, they can imitate that good soldier-catechumen giving half his cloak to a poor beggar. Then start pre-Advent with Saint Martin's Lent.

Even the secular National Park Service agrees with this.

The First Thanksgiving

On September 8, 1565, Pedro Menéndez de Avilés and 800 Spanish settlers founded the city of St. Augustine in Spanish La Florida. As soon as they were ashore, the landing party celebrated a Mass of Thanksgiving. Afterward, Menéndez laid out a meal to which he invited as guests the native Seloy tribe who occupied the site. The celebrant of the Mass was St. Augustine’s first pastor, Father Francisco Lopez de Mendoza Grajales, and the feast day in the church calendar was that of the Nativity of the Blessed Virgin Mary. What exactly the Seloy natives thought of those strange liturgical proceedings we do not know, except that, in his personal chronicle, Father Lopez wrote that “the Indians imitated all they saw done.”    What was the meal that followed? From our knowledge of what the Spaniards had on board their five ships, we can surmise that it was cocido, a stew made from salted pork and garbanzo beans, laced with garlic seasoning, and accompanied by hard sea biscuits and red wine. If the Seloy contributed to the meal from their own food stores, then the menu could have included turkey, venison, gopher tortoise, mullet, drum, sea catfish, maize (corn), beans, and squash.    This was the first community act of religion and thanksgiving in the first permanent European settlement in North America. It took place just 300 yards north of the Castillo de San Marcos, at what is now the Mission of Nombre de Dios. This event is commemorated today by a 250 foot cross which stands on the original landing site. Today's Holiday The thanksgiving at St. Augustine was celebrated 56 years before the Puritan Pilgrim thanksgiving at Plymouth Plantation (Massachusetts), but it did not become the origin of a national annual tradition. During the 18th century, British forces won out over those of Spain and France for mastery over the continent. Thus, British observances, such as the annual reenactment of the Pilgrims’ harvest festival in 1621, became a national practice. After the United States became an independent country, Congress recommended one yearly day of thanksgiving for the whole nation to celebrate. George Washington suggested the date November 26.    In 1863, during the bitter struggle of America’s cινιℓ ωαr, President Abraham Lincoln established the last Thursday in November as a National Day of Thanksgiving, making it truly a national holiday. The President urged prayers in churches and in homes calling on the "whole American people" wherever they lived to unite "with one heart and one voice" in observing a special day of thanksgiving, and to "implore the interposition of the almighty to heal the wounds of the nation and to restore it...to full enjoyment of peace, harmony, tranquility and union."

Last updated: April 9, 2018
https://www.nps.gov/casa/learn/historyculture/the-first-thanksgiving.htm

TIA is known, not only as a Plinio-worshipping cult, but also for having writers who are habitual plagiarizers.

At any rate, Happy Thanksgiving!