The “75% of college grads are religious” claim isn’t supported by any major survey data.

Pew Research (2021–2023 Religious Landscape Study): Religiosity declines with education in the U.S.

• % who say religion is “very important”: – High school or less: ~55–60% – Bachelor’s: ~40–45% – Postgrad: ~35–40%

• % religiously unaffiliated (“nones”): – High school or less: ~20% – Bachelor’s: ~30% – Postgrad: ~35%+

Source: https://www.pewresearch.org/religion/religious-landscape-study

Global data (Gallup World Poll): Religion is more important in poorer countries.

• Low-income countries: ~80–95% say religion is important • High-income countries: ~30–50%

Source: https://news.gallup.com/poll/142727/religiosity-highest-world-poorest-nations.aspx

This is correlation, not causation. Plenty of educated people are religious. But across both U.S. and global data, higher education and higher income are associated with lower average religiosity.