Bart was conflicted, he didn't want to discount his mom, but he also didn't want to disappoint God. He knew in his heart that being Catholic was for him. But his parents wouldn't like that. Well, maybe Homer would be okay with it, but his opinions can vary whether Marge disagrees or agrees with him, and religion seems to be his mom's department.
Bart tried to ignore the feeling when he was going to his old public school. He didn't notice the other students and teachers looking at him, expecting him to pull a prank or vandalize something.
Krabapple had enough, after a month had passed. She knew this Bart wasn't her Bart. She never wanted to see a student suffer, and it was clear, this young man was suffering. "Bart, please stay after class." Bart looked up, he didn't do anything, but he had too much to think about, so opted against arguing. It would just be a waste of valuable thinking time.
Bart stayed behind after class, sighing. "Now Bart, I must say your behavior has been remarkable. You seem down, is everything alright at home?"
"Ma'am, is it wrong to go against your parents when something is important to them?" "What do you mean, Bart?" "Let's just say my mom is against me doing an extracurricular that is really important to me. What do I do?" "Bart, I can't tell you what to do in your home life, but I suggest talking to your mother."