I think it's a smart choice of words, speaking ill of him in a public setting would be risky.
"But there are rules - and then there are sound engineering principles and the laws of physics."
From the article it's quite clear to me that he knew it was a matter of time.
"We have heard the baseless cries of 'you are going to kill someone' way too often," he wrote. "I take this as a serious personal insult."
This is a very unfortunate quote. Ego. Big big ego.