Yes, I am. Depending on whom you base your ideas on what art is you can defend the case that art has two main components - its conceptual (the political or other ideas of the artist) and its perceptual part (the craftsmanship).
In this case the conceptual part of the work is completely removed, leaving only the craftsmanship. I see no problem in sharing this, and I see no possible slippery slope here.
In short, just because someone is a fascist does not mean they can’t be a good craftsman, and should not be seen and analyzed. Take for example Adolf Dassler’s Adidas.
Quite frankly, I would also love to see what the original cartoon looks like. Not because I would agree with it, but because I want to know how extreme rightwingers represent me (or us, I guess). I want to know how their propaganda looks like. And I personally believe we should all know and care about it, if we want to combat it successfully.