jump down someone's throat
US /dʒʌmp daʊn ˈsʌm.wʌnz θroʊt/
UK /dʒʌmp daʊn ˈsʌm.wʌnz θroʊt/

1.
to react angrily to something that someone says or does, often without good reason
:
•
I just asked a simple question, and she immediately jumped down my throat.
•
Try not to jump down his throat; he's just trying to help.