The .org people (Federico Musto) are different than the Arduino.cc people (Massimo Banzi). Terrone seem to have some sort of personal vendetta going on here causing him to repeatedly lash out at them and spread rumors.
I don't know exactly why, but take this post in the broader context of what has been going on. I know people who have worked with Terrone. His reputation is not so great either, he is an arrogant dude.
Further evidence of this fun campaign:
In the article where Federico Musto is reported to have faked his background, it says at the bottom that Philip Terrone is the source of the tip about Musto's educational background (Link: https://www.wired.com/2017/04/arduinos-new-ceo-federico-must...).
"With this evidence in hand, Fried and Torrone emailed Musto, who replied that it was a mistake, and that he would correct the matter. But his various internet bios kept citing the credentials. So the pair contacted the media."
So take this post with a grain of salt, it is part of a smear campaign that Terrone is going about online.