A retraction? It will be a upside down day in an alternate reality before the Trumperazzi win the battle over who defines the truth and who defines the facts. 
Labeling what Kushner was doing as "diplomatic" is giving him the benefit of a doubt. That would fit your view that there's nothing to see here. Maybe he was just getting ahead of things before the administration took office.
But if he's not doing diplomatic work Kushner's intentions were far from benign. Creating a communication line that would have no external security is corrupt and treasonous for a soon to be government official. This was likely an attempt to keep illegal financial relationships secret. 
Subpoena the tax returns. Let's be done with this.