How famous does someone have to be joke about a politician dying before it’s a problem? Tan is less famous than Charlie Sheen or Johnny Depp, who have joked about Trump dying.
Also, from Wikipedia: “Tan supported the 2022 recall campaign against progressive San Francisco District Attorney Chesa Boudin. Tan donated at least $100,000 to the effort. Tan blamed Boudin for physical attacks on Asians.”
There’s a fair argument that Tan is joking about violence against people whose policies are facilitating actual violence.
I doubt he meant it particularly literally, but there’s little question it was written with malice.