My guess as to the Bobby plot line- he's not going Nomad (it's only been speculated on by other characters), instead he's recruiting disenfranchised members from other charters to join SAMCRO and give them a full table again.

Jax had the KG9s that the Irish left put in the neo-nazi compound before he told Chibbs to burn the house down. My takeaway is that he's trying to pass the white supremacists off as the ones moving those guns, and therefore the ones responsible for the school shooter getting his weapon.