Damore is not the one that leaked the doc to Gizmodo, as far as I am aware. The controversy that ultimately lead to him being fired, cancelled, blackballed, and literally leaving the country were directly a result of the internal memo intended for an internal audience becoming public. It would seem the height of stupidity for him to leak the memo himself. He confirmed its authenticity because he was given the opportunity to provide a public response to the comments people had made on it, which is posted at the end of the version I linked.
What's your claim here? That the published memo is fake? That Damore didn't write the things he said that he wrote, and that he suffered serious consequences for having written?
What? The outrage was caused by the leaked memo. If it were fake...why would he have gotten fired to begin with? You seem to be intimately aware with the 'real' memo, care to link some evidence to what was in it? Person who replied to you is consistent with my memory of the events at the time.