Answer:
o take a more aggressive stance against slavery
Step-by-step explanation:
It would make them do this because they would be like oh, they shouldn't be able to do that and so that would make them fight more. Also, they would do this because they this Law is helping the plantation owners and basically saying slaves are owned so they should be returned even if they are in a free state which made the abolishionists angry. Hope this helped! Have a good day :)