Assumptions, and not necessarily true. Please provide a source.
Please understand that these are correlations and do not apply to everyone but yeas, a number of studies have shown those most educated and most intelligent are more likely to be atheist..doesn't mean intelligence=atheism or that stupidity=belief...wiki:
Studies comparing religious belief and I.Q.
In 2008, intelligence researcher Helmuth Nyborg examined whether IQ relates to denomination and income, using representative data from the National Longitudinal Study of Youth, which includes intelligence tests on a representative selection of white American youth, where they have also replied to questions about religious belief. His results, published in the scientific journal Intelligence, demonstrated that Atheists scored an average of 1.95 IQ points higher than Agnostics, 3.82 points higher than Liberal persuasions, and 5.89 IQ points higher than Dogmatic persuasions.[4]
Nyborg also co-authored a study with Richard Lynn, emeritus professor of psychology at the University of Ulster, which compared religious belief and average national IQs in 137 countries.[5] The study analysed the issue from several viewpoints. Firstly, using data from a U.S. study of 6,825 adolescents, the authors found that atheists scored 6 IQ points higher than those adhering to a religion.
Secondly, the authors investigated the link between religiosity and intelligence on a country level. Among the sample of 137 countries, only 23 (17%) had more than 20% of atheists, which constituted virtually all... higher IQ countries. The authors reported a correlation of 0.60 between atheism rates and level of intelligence, which was determined to be highly statistically significant.[5]