First of all, that was a tweet by Matt Green who is a lead dev on zcash talking to Peter. Not sure why you even brought Peter up… but because you did, I shall respond. I know the backstory of Peter going to Troon (both sides) and I’ve personally debated SAFE with him including his Google attack which is actually the same problem @GabrielDVine brings up in this thread. I don’t think it’s unreasonable to question this attack… it’s SAFE that has to prove this attack is improbable and that comes with testing.
Sure, Peter’s got an ego and ya, he tends to critique without giving positive solutions… but I suspect that’s his method of roping people in so they pay for consulting (that’s how he earns an income, afterall).
Anyways… back to the topic!