Another of those bridging scenes double meanings: LaShawn says "....boy, were we behind the times". And the film cuts directly to someone else who's behind the times - Alma Jr., waiting for her daddy and apparently behind the times when it comes to recent developments (ie. Ennis having hooked up with Cassie).
Amanda, you've made many interesting points about Earl and Rich. I absolutely agree that Ennis had and still has a grudging respect for them. (I wonder how old they were when Ennis was 8. At that age, doesn't take a lot of years to appear "old".) But on top of the respect the boy had for them before the gay bashing, I think his father's action instilled deepset fear and disgust of homosexuality into Ennis, whether it be in Earl and Rich or in himself, a disgust that he couldn't reconcile with the other parts of eithers' life . Ennis seems to tie himself in endless conflicted knots over that, and probably over how to think of his father and his actions as well. I think he's got quite a lot of grudging and mixed-up respect for his dad too, in addition to a lot of hurt anger and fear and - probably - contempt. At any rate he's unable to speak out against his dad - or for Earl and Rich - without ambiguity and mixed-up emotions creeping in among his words.
I know Ennis uses the tire iron and risk of being killed as his reason for keeping Jack at a distance, but that's not the only or even main reason, IMO. He'd not be that afraid of physical violence and standing up to the threat of physical violence if he'd known himself to be in the right. But he doesn't - some significant part of him thinks they'd be right for coming after him with tire irons, if he should decide to have a go at the "sweet life" that Jack wants. "Two guys living together - no way" doesn't only apply to what society at large would think about it, but to what Ennis himself truly believes as well, and the shame he can't manage to shake or alter even when the love of his life is at stake - till it's too late.