Swastika on Indus Valley seal

UNITED STATES,, April 16, 2025 (Holocaust Encyclopedia): The word swastika comes from the Sanskrit svastika, which means “good fortune” or “well-being.” The motif (a hooked cross) appears to have first been used in Eurasia, as early as 7,000 years ago, perhaps representing the movement of the sun through the sky. To this day, it is a sacred symbol in Hinduism, Buddhism, Jainism, and Odinism. It is a common sight on temples or houses in India or Indonesia. Swastikas also have an ancient history in Europe, appearing on artifacts from pre-Christian European cultures. The swastika experienced a resurgence in the nineteenth century, due to growing European interest in the ancient civilizations of the Near East and India. During his extensive excavations, the German archaeologist Heinrich Schliemann discovered the hooked cross on the site of ancient Troy. He connected it with similar shapes found on pottery in Germany and speculated that it was a “significant religious symbol of our remote ancestors.” Other European scholars and thinkers linked the symbol to a shared Aryan culture that spanned Europe and Asia.

In the beginning of the twentieth century the swastika was widely used in Europe. It had numerous meanings, the most common being a symbol of good luck and prosperity. However, the work of European linguists and other scholars was taken up by racist groups, for whom the swastika was a symbol of “Aryan identity” and German nationalist pride. This conjecture of Aryan cultural descent of the German people is likely one of the main reasons why the Nazi Party formally adopted the swastika or, what was also called in German, Hakenkreuz (literally, “hooked cross”) as its symbol in 1920. The Nazi Party was not the only party to use the swastika in Germany. After World War I, a number of far-right nationalist movements adopted the swastika. As a symbol, it became associated with the idea of a racially “pure” state. By the time the Nazis gained control of Germany, the connotations of the swastika had forever changed.

Much more at source.
https://encyclopedia.ushmm.org/content/en/article/history-of-the-swastika