Why don’t journalists challenge Trump’s insults?

US President Donald Trump asked a journalist today if she were stupid and then shouted at her that she was stupid.

When this happens why is there not a journalist anywhere in the world who will challenge him and  tell him not to speak in such a manner.

Why do so many people bow to authority, especially when the authority is inept, inefficient and downright rude.

Then again, those who do, know the price that has to be paid. But it’s worth it.