Answer:
It's important to understand and fight horizontal oppression because:
A vulnerable group mustn't attack between himself, they must look for equal opportunities and a better life level, the reason why everyone must stop this type of oppression.
Step-by-step explanation:
The horizontal oppression is the action where members from the same vulnerable group attack other members by reasons like different thoughts, conflicts of interests, or prejudices. How this behavior doesn't benefit the people in that group, in change, further affects them, the best action, in that case, is to stop immediately this action and make the aggressor see his mistake, an example can see where an afro-descendant harass another member of this population because be weak.