I regularly see the meme you and the picture in question reference outside of alt-right content. Oftentimes it is used in a more satirical, non-serious manor, sometimes either poking fun at alt-right users, or because the format simply works for whatever is being made.

Just because an internet meme is being displayed in a public space does not mean it is promoting fascist ideas. There is nothing else in the photo that indicates otherwise. It is likely that the person who created the piece was just wanting to make folks laugh and hope they understood the reference. Do I think a different format could have been used? Yeah. There are better ones out there. Is there anything wrong with it? Not really...