This one bothers me. I understand what the artist was trying to do, equating neo-Nazis and the alt-right with the KKK, but there could be other interpretations.
If you look at the way the color is applied, it could be seen as a "new day" for the alt-right, going from a bleak past and entering a brighter future. It wouldn't surprise me if the alt-right decided to adopt this cartoon for their own.
Anything powerful is dangerous. Here's a quote from Pablo Picasso:
"Art is not made to decorate rooms. It is an offensive weapon in the defense against the enemy." "La peinture n’est pas faite pour décorer des appartements. C’est un instrument de guerre offensive et défensive contre l’ennemi." "La pintura no se ha inventado para adornar las habitaciones. La pintura es un arma ofensiva, en la defensa contra el enemigo."
I wonder if people from the alt right can stand to watch World War II movies? It might make them sick to their stomachs seeing so many Nazis gunned down and blow up, and make them sad to see the Allies winning the war.