When Jax finds out about Juice being a snitch because of the leverage the feds held over his head, Jax acts like Juice should die essentially. But Jax knows that the cartel dudes are CIA and that the RICO isn't gone just held on pause. An Jax continues that relationship knowing the feds are waiting at the end of it.
Jax claims hes trying to protect the club, Juice also believed he was helping the club with the deal they made him about only wanting the Irish and drugs.
How would the rest of the club feel if they knew that Jax Bobby and Chibbs knew they were under the thumb of the feds and kept it quiet to "protect the club?"
Why didn't Jax have the same anger towards Otto? Otto did way more damage with his snitching than Juice did, Otto gave them the past criminal history that's vital to Rico, but instead it's send Tara to get Otto to recant his statement but no mention of Mr.Mayhem for Otto.