Show me, in the warrant application, where they swore the document was true.
They didn’t. They never swear to second hand information. In a case like this, or any involving second hand information, Law enforcement swear that they have received evidence and state what the evidence is. The judge determines how much weight to give it and whether that amounts to probable cause.
Who wrote the dossier? A non governmental informant. As the Supreme Court just told you, the veracity of their statements to police are not a recognized basis for challenging the validity of a warrant. If they were expected to always be able to prove their second hand information, they wouldn’t need a warrant to keep investigating.
Your argument is pure legal fiction.