Don't you think that the Barbarian Bloodrager can decide or choose wich spells he wants to accept or resist? Let me explain this...
3 rd level Bloodrager ability = Blood Sanctuary +2
It is stated that ".. a bloodrager can stand
confidently amid the effects of spells cast by himself or his allies"
With the "superstition rage power"
I can understand the Bloodrager must save even allies spells but can stand confidently amid the effect of this spell. He may wants to confidently accept the effect of this spell by having a success on his saving throw...
Does it make sense?