That’s a good question actually.
I see both people and bacteria in colonies as equally intelligent. I don’t know what “stupid” means, except, “you’re not agreeing with the ‘us’ therefore you are the stupid”.
Intelligence can both mean: Ability to come up with novel concepts/solutions/questions/creativity and ALSO can mean: the ability to duplicate someone else’s thinking processes (school) and apply them consistently.
SO, it depends how it’s used.