Near as I can tell since moving back, being "Iowa nice" means "be white and republican and talk down to everyone else" so no, more like acts nice, is mean for us.
Bruh, I moved out here two years ago, and holy shit! These are the most miserable, hateful, rude, nasty, violent, stupid, lazy, and just all-around shitty people I have encountered in my life. Really, damn near everywhere I go in this state, I observe this behavior. I'm originally from Michigan, but I've been all over the US and really have not been anywhere like this.
I get that this is basically a politcal compass meme overlayed on a map (and also that this is in cartography anarchy), but here's how I'd actually divide things up based on basically 0 practical experience:
Acts nice, is nice: West Coast (WA, OR, CA, HI) (WA might have to move down to the next category if they're feeling surly)
I get the perception Cali can be prickly too, although I've never been there. Maybe orange for them too? And come to think of it, inland Oregon is very Idaho.
And of course that only aims to divide things up into big blocks similar to the original image. If I wanted to get more granular I'd probably put UT in "Acts nice, is mean" for example.
My experience having lived across the US has been closer to https://youtu.be/u3qJlWQNNxA?si=EU_dgGLT-vWgmNXy - I haven't met a kind ("actually nice") person in Northern California who grew up there.
Quick context, if you ask for directions in Seattle, people will gladly help, but you will see the terror in their eyes that they have to socialize with someone they don't know.