Not a ground crew. Never was.
And yes, anyone can recieve training. It's what they do with the training that matters. I thought you implied it wasn't difficult to do something like de-ice. From the concourse to an armchair aviation observer, it's not difficult. It's the folks who say "anyone can do that" who have warped egos. The fact you don't know what's involved and made that statement proves my point. Have a nice day.
Fox news reports on a quote from the pilot that the tried to airborne the plane and just "lost control".