Using both educational attainment and level of religiosity as a proxy for open rationalism, are countries which score high on those ranks more accepting of open rationality? Top fits would be places like the Czech Republic, Finland, Sweden, and maybe Germany.

Depends. The countries in question come with their own ideological quirks. Especially Scandinavia is in a way a very conformist culture. Conformist to Liberal sensibilities but basically filled with people who have internalized a very low regard for any deviation from those sensibilities (I have heard Sweden mockingly referred to as the Saudi Arabia of Feminism).

The Czech Republic seems a good bet. Free of PC and free of conservative religious and other silliness. Perhaps the older generation carries some pro-Communist nostalgia, which makes the anti-free market bias a bit stronger but their historical legacy probably softens that too.

Also the beautiful young ladies there where a riot last time l visited * thumbs up *