In short, there were lots of ways to mock each of the HGs. So why center on just James and Erika?

First of all, it was only an hour show, and they couldn't call out every.single.thing. Erika was focused on because she was final 2, if Jani had been final 2, they would have focused on her. Same with Boogie (who was called out plenty) and Will.

As far as James goes, he was part of the biggest alliance on the show that failed. His part in that failure took up a huge amount of the season, and it was only natural that Kaysar would want to call him out. The rest of the non-jury people didn't have anyone to call out, and the rest of the (non jury) time was spent on the who-cares M&M Smith bit. Allison called out Erika because she was final 2, and they have a personal history of hating each other.

Because the LoJ saw them as the two who most betrayed the beloved Janelle, that's why.

LMAO! I hate to break it to you, but you are more obsessed with Janelle than most of the LoJ are. Sure, I'd have like to have seen Jani and Will called out on their behavior, but the show was mostly about the final 2 as it always has been. Now, if they'd do a reunion type show, or town hall as they've done in the past, I think you'd have a point, but as it was, the finale was a nice balance of the major plot points of the season, focusing mostly on the final 2.