シンボルの意味は変わる、と

学校が正しく、この生徒の頭がおかしい。ナチ式敬礼は、１８９２年に星条旗に忠誠を誓うために考案されたベラミー敬礼で、実際以下の写真は第二次大戦の開始後１９４１年です。その後ドイツ人の犯罪が明らかになってナチ式敬礼をやめた、シンボルの意味は変わると説明した授業に文句をつけたもの。 https://t.co/k1stJuXqMj pic.twitter.com/IkfyIRTbUH

— buvery (@buvery) February 10, 2022

ナチの敬礼の起源は
Bellamy saluteFrom Wikipedia

The Bellamy salute is a palm-out salute created by James B. Upham as the gesture that was to accompany the American Pledge of Allegiance, which had been written by Francis Bellamy. It was also known as the "flag salute" during the period when it was used with the Pledge of Allegiance. Bellamy promoted the salute and it came to be associated with his name. Both the Pledge and its salute originated in 1892. Later, during the 1920s and 1930s, Italian fascists and Nazi Germans adopted a salute which was very similar, erroneously attributed to the Roman salute, a gesture that was popularly believed to have been used in ancient Rome.

27th February 2015    By Frances White

Where did the Nazi salute come from?

Like many of the symbols of Nazi Germany, it was not created by the party. Adopted in the 1930s it is commonly believed that the salute was based on an ancient salute used by the Romans. Although there are no contemporary Roman texts that make reference to this salute, the Nazis can be forgiven for believing it was Roman as many 19th and 20th century plays, artwork and movies depicted the salute as ‘Roman.’ The first time the salute can be seen is in the Jacques-Louis David painting Oath of the Horatii created in 1784.

古代ローマ人がやっていた証拠はないけど、とにかく、古代ローマ人がやっていたと信じられていた敬礼から取ったものだ、と。

アメリカの敬礼のほうがナチの敬礼より古いがナチの犯罪が明らかになってアメリカの敬礼のは取りやめになった。

で、アメリカの歴史の授業で、

Ephraim Tytell said his class was learning about what the Nazi salute meant before it became a hateful gesture.

“He [The teacher] explained to us that in America we used to do that before WWII and everything and then he proceeded to show us, ask us to stand up to salute the flag and he and everyone else did the Nazi salute,” Ephraim told CBS 42. “I felt upset, unsure of what’s going on. Just kind of shocked.”

この敬礼はいまではナチの敬礼を意味するが、それ以前はアメリカに忠誠を誓うために使われていたんだよ、ということ教えていたんだ、と。その文脈を取っ払って写真とか動画を上げて非難されてもなんだかなあああ、といったところだろう。