Don't much care one way or another what you think of my post. Read the book to get the background....those statements don't represent the author's opinion. They represent the findings of studies.
So, yes, the more religious one is, the more likely that one is virulently racist.
And the more racist one is, the more likely that one attends church and bible study regularly.
Do your own little experiment....find the ten or so most fervent "believers" you know. Ask them all their opinions of, say, Black Lives Matter, Afghan refugees living in their neighborhood, and designating Juneteenth a national holiday. Come back and let us know what you hear.