It’s an emoji “on loan” from the folks at Hexbear, who have their own collection. Just copy down one of the following:

![AmeriKKKa](https://hexbear.net/pictrs/image/6dedb145-206a-4b35-ab5e-c9e41e1130c7.png "emoji amerikkka")

![KKKanada](https://hexbear.net/pictrs/image/478c2b58-b7bd-4c22-9f22-df7c3ea55a98.png "emoji kkkanada") 

![Pi$$rael](https://hexbear.net/pictrs/image/f68ad49c-f034-44a8-9590-4e91a08997b4.png "emoji isntreal") 

![ukkk](https://hexbear.net/pictrs/image/8e576036-161c-4678-b17e-788d18d142c0.png "emoji ukkk")  

![eu-cool](https://hexbear.net/pictrs/image/902a5d92-2202-4090-abe6-099101ecbd5e.png "emoji eu-cool")  

![un-cool](https://hexbear.net/pictrs/image/f7b30233-dc08-43f3-a33e-43331e64b1fc.png "emoji un-cool")  

![nato-cool](https://hexbear.net/pictrs/image/a80caf10-1836-474e-93bf-2465044d6a0d.png "emoji nato-cool")  

![crab-rave](https://hexbear.net/pictrs/image/91da3b7c-6c07-4c00-ae72-3c1c43294af2.gif)

![rat-salute](https://hexbear.net/pictrs/image/94bcb899-8542-45fb-9dd7-b4a49a944346.png "emoji rat-salute") 

The text in square brackets [] is alt-text, so you can change it it if you want (e.g. AmeriKKKa —> AmeriKKKan) without affecting what is shown. I believe that the text in double-quotes has to start with “emoji” for Lemmy to expect it as an emoji.

Enjoy