Yes, agreed with all of this. Though as you suggest, the two can overlap. “Give million dollars to an organization that will freeze your head when you die” can become a group norm, and “refrain from political examples, personal attacks, irrational arguments, etc.” can be a group idea. And as you say, it is common for one to be confused for the other, sometimes deliberately for rhetorical effect.
Yes, agreed with all of this. Though as you suggest, the two can overlap. “Give million dollars to an organization that will freeze your head when you die” can become a group norm, and “refrain from political examples, personal attacks, irrational arguments, etc.” can be a group idea. And as you say, it is common for one to be confused for the other, sometimes deliberately for rhetorical effect.