"But listen, the the world is pretty much always gonna see the swastika as a nazi symbol[...]"
By "world" you mean the west.
"[...]but it's gonna be a very very long time before people will see the manji and not go "uhh... that's a swastika""
By "people" you mean westerners.
I'm glad that you understand that the swastika is also a religious symbol, but I hope you see the problem with what you're saying. No doubt there are asians who don't know or understand the horrors of the holocaust. We see it when tourists visit concentration camps without showing the proper respect. But the point the author is making and what asians around the world hope westerners understand is that our iconography in our own countries can't be redefined or suddenly become offensive just because a westerner sees it differently. The history of the west is not the history of the world, and people who grew up in the west have such a hard time understanding this.
In other words, for a swastika drawn in asia, there is no such thing as "no going back" to its original meaning because its original meaning never changed.
Of course us we can sit here and debate this until the end of time because the moment these pages are exposed to a western audience, a manji will look like a swastika and that is that. But thanks to misticsan, now I get why author drew these pages in the first place. It sucks when people come to your country and then don't understand your customs or find them offensive.