I think most Americans think of that as well. It’s even the first several Google search results for “ss”. Bad name choice.
Though we (Americans) didn’t get the fun “tulip” bit.
There’s so many poor names in FOSS but people refuse to change them out of attachment for history. One other example comes to mind: Gimp.
Basically, devs are terrible at naming things.
Funny, in the US I just saw a car that was an “SS” model and I thought “Huh, apparently SS doesn’t immediately scream Nazis to Americans” (SS => Super Sport apparently, to Chevrolet)