The one civic negative that Putnam and Campbell find about religious people is that they are more likely to oppose dissent and accept restrictions on civil liberties.
After disposing of two possible arguments - that religious people are more Manichean in their worldview, or that religious skeptics support dissent - the authors offer a different explanation.
Religious people support authority more than secular people do. Religious people build up the social order by giving and serving those in need. For a similar reason, they build up civic order by supporting the authority on which that social order legitimately rests.