It would be them “trusting” Zod like they “trust” Darkseid. They know he’s going to betray him at some point but they work with him to beat Darkseid first. Basically the Light does to Darkseid what he was trying to do to them by making a deal with Lor. There needs to be some tension in the Light, why the hell is everyone on board for the Caveman’s master plan? You telling me Lex doesn’t want to be on top? Pffft I don’t buy that.
Mary was an addict and Granny preyed on that. Kara like I said probably suffered from Zone sickness given she was likely on her own, making her easy prey for Granny’s brainwashing.