The article reports that the OSS received word of an overture and had it evaluated by two sources (both outside and inside the agency) and that the OSS did not find it credible enough to pass to the Joint Chiefs.
There was also another possible explanation for the overture which was well known; to develop a wedge between the allies-
He further warned that considering the German generals’ plan without Russian “knowledge and agreement” would be a “grave mistake” and contended that the Russians were “prepared to play ball but equally prepared and determined to execute a volte-face if the British and the Americans do not play fair.” His recommendation, issued on March 15, 1944, was to “keep the wires open” and find out more about Moltke’s group in the High Command, but “lay all military plans as though this group not exist.”
If there were to be an overture with the German Generals then it wouldn't be between FDR and the Generals it would be between all of the allies, there was already an agreement in place that no ally would respond to any German overtures without agreement from the other two.
As for putting Jews at risk when Fenyvesi broke the story about Operation Moses the initial assessment was that it would put 5,000 African Jews lives at risk. They were saved but the cost was substantial, all for a meaningless 'scoop'.
And another ironical footnote. The agency that Fenyvesi reveiled that was helping the African Jews was the same that resettled him from Hungary when his family fled in 56.
And again, you have changed the title of the article. While it is obvious that the author wants to smear FDR, the actual historical evidence he introduces in the article simply documents that an overture was received and evaluated by the OSS. There is nothing in the article that claims that FDR was ever briefed on the overture, or that it was though sufficiently credible to pass to the allies for consideration. Your title is inaccurate, disengenious and not supported by the article.
Again the fact that the article shows that the same generals that were supposedly planning a coup came back to enthusiastically lead the Battle of the Bulge shows that at best the overture was never a practical option (which was the OSS's internal evaluation) or that it was part of a plot to divide the allies.