First, the report finds that, "...respondents are more than twice as likely to self-report 'a great deal' of prejudice toward Muslims if they say they attend a religious service less than once a week, which suggests that religious practice makes people less likely to express extreme prejudice." (p. 14) Second, the study also found that those who attend religious services more than once a week, "...are more than twice as likely to report feeling no prejudice toward Muslims." (p. 17)
People who are less active religiously, in sum, are more apt to self-report prejudice against Muslims while those who are active in the practice of their religion are more than twice as likely to report no prejudice.
This is what we would hope, that Americans of faith would show more tolerance of and openness toward Muslims at a time when many Americans have a deep prejudice against them. (The study found that the respondents were "more than twice as likely to report having negative feelings toward Muslims as toward Buddhists, Christians, or Jews." - p. 18) Practicing a faith is supposed to make us better people. It's good to know that sometimes it actually does.