Someone yelling can still be right. Separate how they said it from what they said.

Delivery and content arrive together and your reaction sorts them into one thing. When someone comes at you badly, dismissing the message is the natural defense and often the wrong one, because being upset does not make a person inaccurate. The volume is about their state. The claim still has to be weighed on its own.

After the heat has gone out of it, write down the actual point they made, without the tone. Decide separately whether it was true and whether the way they said it was acceptable. You are allowed to take the point and still tell them not to speak to you that way.