Why do people always seem to think that context is irrelevant whenever domestic abuse is involved?

So, if your partner cheats on you and you react by shouting abuse at them, but they record your reaction and post it on the internet to make you look like the bad guy, does that automatically make you an abuser?
If a woman slaps a man because he cheated on her, does that automatically make her an abuser?
If you see someone being lynched in the street or hear that someone is facing the death penalty, do you automatically side with the person being punished, or do you actually use some critical thinking skills and ask yourself, "Wait, what's the context here? What led to this situation?"
The point is that context matters, and you shouldn't automatically jump to conclusions without knowing the full story. Tired of hearing about men getting called out for hitting a woman no matter how much harmful things the woman did or put him through. Of course this can happen to women as well but women don't get looked at badly if they stand up for getting treated like shit
Why do people always seem to think that context is irrelevant whenever domestic abuse is involved?
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