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This is the problem with the nature of tech. As long as you have character joiners (a needed thing, if not great), the no-sign (a useful character), and diverse emojis that help people express their identity (a really good thing), this will be possible.
Heck Unicode *does* have ࿕ and it's perfectly fine because it has non-hateful reasons to be there (it means completely different things in other cultures). It also has an actual 𓂸, because it's an Egyptian hieroglyph.
Now if Unicode had a swastika set at 45° (that wasn't the result of a generic feature to rotate characters), *that's* when I'd start being worried, because as far as I can tell that is quite strictly a Nazi thing. Intent matters, and this stuff is subtle.
Yes and no. You have to be careful with that, a lot of cultures disowned the image of the non-inverted swastika post-wwII because the inverted swastika had tainted it's meaning. There are some words/symbols where intent doesn't matter, the meaning is clear or has changed.
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