AR (who I have never met and spoken briefly to just once) and I happen to have many mutual friends, people I have known since before they knew Rossi. Those people he is supposed to have traduced and betrayed. Funnily enough, they are still his friends, and I am still theirs. I think that is enough explanation for now.
As for IH, I have little to say about them beyond the fact that they are venture capitalists, with all that descriptions entails, good and bad. Not really my kind of people.
I don't think many of us think Rossi traduces and betrays people (except IH and if you believe his e-mail Hydrofusion). Merely, he inspires them with the very attractive idea that his devices work. Just as, for example, Levi probably still believes the Lugano measurements indicate at least COP=2 and therefore disruptive technology.
There is a good reason why hearsay is not allowed in legal evidence!