I would like to see how Judge Nelson ruled on the authentication issues.
She didn't. There weren't any.
Neither party raised any authentication issue for Nelson to rule on. As cboldt
said, it was Nelson who brought up authentication.
It came up during the discussion of fighting. O'Mara mentioned that the evidence he would bring on reputation included text messages and Facebook posts. Nelson asked how he would authenticate them. O'Mara said he had people who had participated in the conversations under subpoena. (3/28/13 hearing,
Nelson was engaging in a digression, asking O'Mara for a preview of what he intended to do at trial. There was no authentication issue before the court, and so no ruling on one.
In some of her rulings, Nelson commented that the evidence would only come in if it passed other hurdles, like authentication and hearsay. Those were just comments, not part of the rulings. They were reminders that those issues were not before the court, and hadn't yet been ruled on.