Hey there! I'm happy to help!
The part that particularly angered Northerners was that if they did not enforce the act, they were subject to jail time or a fine. Even if Northerners opposed slavery, they could still be neutral in terms of what they do to help slaves or not. The Fugitive Slave Act forced them to go against their own beliefs with this potential jail time or fine, which really angered them.
Have a wonderful day! :D
D because the Greeks did believe the gods would determine their fate. They thought if they did something wrong or disobeyed the gods, the gods would punish them, and now days we have myths saying some of the things they would believe.