Emoticons were created to convey emotions like irony and sarcasm (

). Slang can be "interpreted" by right-clicking on any word in just about every browser, even ones like Yandex (I check my own site pages in about 10 browsers). The fact that I get along in 5 or so languages means that I am very attuned to nuances; add to that at least a half-dozen or so very different dialects of Spanish I use in work in Latin America.
I have no problem with non-Hispanic whites, except for those that speak in very different dialects or have a very different cultural based vocabulary. My birth family, on my mother's side, reached the Massachusetts colony around 1650 and my father's family arrived in eastern Long Island when we were still a British colony.
However, the shooter apparently selected purposely his inscriptions for personal or social reasons. It seems obvious that an anti-Fascist slogan on a bullet that was part of the "armory" used to kill a MAGA leader perceived to be Fascist is likely, probable and maybe definitely intentional.