incredulity

Aye, right - A sarcastic phrase - used ironically to express contempt or incredulity.

It sent shock waves through City Hall and the Police Department, where many expressed incredulity at the prospect of a respected government official faking a bomb threat.

He is talking with incredulity about the fact United, at the time of this meeting, are 14th in the Premier League.

“It’s just such a dumb, self-inflicted injury,” he said, noting the response in Canada has been one of anger and incredulity.

Le Pen's incredulity can be better excused, perhaps, in the context of the moment.