Iowa Nice

What does ‘Iowa Nice’ mean, and which Iowans are eligible for the title? 
Is it merely being pleasant to neighbors and strangers alike? 
What if receiving the 'Iowa Nice' label depends on how each Iowan treats unborn children? 
is a Washington Post article about Dubuque, IA Catholic nuns trying to help get Joe Biden, an avowed pro-abortion advocated, elected to POTUS in 2020. 
These nuns are not Iowa Nice. 

And neither are current Democrat contenders for Iowa's seats in Congress, in both the House and Senate.

When I think of Iowa, pro-abortion Democrats claiming to be Iowa nice, 
I think of Nazi Concentration Camp guards prodding naked Jews into the gas chambers to die.