Tolkein said the Lord of the Rings wasn't an anti-war parable or allegory, although that's a valid interpretation, it's wasn't the author's intent. And the books had plenty of war and indiscriminate killing in them, being based as they were on Germanic and European mythologies which considered war a glorious and noble act.

Maybe in a thousand years Westerners will forget about Nazism and the swastika, but it doesn't necessarily follow that they will replace that knowledge with the Buddhist interpretation of the same symbol. Sure, stranger things have happened, it's not impossible, but it seems incredibly unlikely.

It's certainly not going to happen within my lifetime or yours.