About 10 or 20 minutes after I posted the story, I found the actual study by Dennison University that is the basis of many of the claims.

Here is the /official/, paywalled, abstract only link on Cambridge's journal or study publishing site:

https://www.cambridge.org/core/elements/abs/full-armor-of-god/2B21DC6F17E88C6DF7275F45A66DF104

And here are various links to the full study provided by scientists amd volunteers who believe information should be freely available:

https://annas-archive.org/md5/da76eb110551fd4028c9c0a8e185f0ce

I have not had enough time to read it but given that 40% + of American adults believe in the Biblical Creation narrative of the world and do not believe in evolution, I'm pretty confident the 30% figure refers to basically American Adults, ie potential voters, in this context.