It's a Hindu/Buddhist swastika, which is still widely used by adherents of said religions.
And this other user has the same avatar and explicitly says they are buddhist.
no other signs anywhere I can see that give any cause for concern.
> In Hinduism, the right-facing symbol (clockwise) (卐) is called swastika, symbolizing surya ("sun"), prosperity and good luck, while the left-facing symbol (anti-clockwise) (卍) is called sauwastika, symbolising night or tantric aspects of Kali.