complete fakes. Created after the war (internet period most likely) with the sole purpose of emptying the wallets of gullible stamp collectors who get a haze before their eyes once they see a swastika.
These stamps are wrong in so many ways that one can't help but wonder how unscrupulous the people who create these must be. Or how dumb they think their buyers are (and most who buy these are poorly informed to put it mildly)
If you desperately want such fantasy stamps, the best place to look is ebay.