Johnny compares Dally to the gallant Southern gentlemen in Gone With the Wind because, well, Dallas is gallant. Johnny proves this by telling a story of how Two-Bit broke out the windows in a school. The cops thought it was Dally and arrested him. Dally didn't throw a fit, or defend himself, or even bat an eye. He took the sentence as it was given to him. How gallant is that?! Dally took a punishment he didn't deserve to protect Two-Bit, even though he knew he didn't deserve the sentence. Dally had been in jail off and on since he was ten. He had been hardened at a young age. Two-Bit may have been in jail before, he may have not, but either way, Dally was protecting him from becoming hardened, the way Dally himself was.