The Bastet loyalists were a few secretive pockets of Jaffa that remained loyal to their god Bastet on the planet Khlem, after the victors of the brief civil war on the world announced Khlem's freedom from her.
When Re'nasha learned that a member of SG-1 was returning to Khlem, she issued an assassination plan to the followers of Bastet. The Loyalist's attacked Colonel Jack O'Neill but failed to kill him. (RPG: "Catastrophe")