Say the situation isn't serious at all. No one is hurt, no one is in the hospital. It isn't a life or death situation.
Say you have a friend. You believe they are your friend and like some of us unfortunately. We are oblivious and naive. We don't know them for who they really are.
Say that your friend wants you to help with something that isn't important at all. Well, lets define not important.
A hobby, like a video game or coding or modding on the PC. It doesn't matter what the hobby is. Just insert yourself into a situation. You may have gone through a similar experience.
Out of many examples of having a friend rage at you.
Say they know someone who is their friend who has nothing to do with you. They have this friend high on a pedestal. They can't help their buddy but you can. However you realize that helping their buddy is a waste of time and you're not comfortable with the task. So, they rage at you saying that person has gone out of their way for them and that it is imperative that you help and that they are really hacked off at you. However, the friend making demands has really never been there for you.
Is it right for that person to than turn around and berate you?
And when they berate you, it makes you feel that your friendship was mainly based on their hobbies and their benefits. Also, how would you feel if your so called friend was placing the other person higher on the ladder than you? That your just the person that is present for their benefit and amusemant?
Would you be okay with that?