From the passage, "point" refers to "an important matter".
This simply means that the statement made by the narrator was actually important. It was not to be taken for granted or with levity. As a result of that, the narrator expects it to be clearly settled.
Explanation: These people are openly accused, just so Abigail can protect herself, and herself alone. She is driven by fear, and her fear will have innocent lives hanged.
Based on Della’s actions and feelings, what theme is best expressed in this passage? Receiving money makes people happy. Making sacrifices for others is unwise because it may not work out well.