[Bored, zzzzzzzzzzzzzzzzz]
Sounds like you didn't understand the reply [as usual].
Citizenship achieved without fraud is not revokable in theory.
However, the early precedents about it said that citizenship was not revokable no matter what.
But there was a big scandal with a very well known pimp who got citizenship. When the Prosecutor saw the file he realized that police lied about his criminal records: they hide that he has records for trafficking women for prostitution and that he owned several cabarets.
So, that Prosecutor achieved the revocation of that citizenship quoting American precedents and books about citizenship.
Why they were accepted? Simple. Americans didn't invent anything, Romans did. The root is the same.
After this first case, American and AR precedents followed different paths.