When I address theist claims I reserve my righteous indignation for the occasional argumentative crescendo over moral issues and spend most of the discussion in a neutral dissection of the problems with the theist claims.
At this point one of two things tends to happen: either the atheist remains in the clique that inflates their superiority complex and the atheist eventually loses interest in the movement, or the atheist learns a thing or two about how to properly address theist claims in more than just canned or general terms.