But thinking makes it so: How bad attitudes can make discriminatory actions wrong

In general, otherwise permissible actions do not become wrong when agents act on bad attitudes. But cases of discrimination can be exceptions to this generalization. It could “be morally permissible for someone to rent her house to any one of several prospective tenants but not morally permissible to refuse to rent it to one of those people because of his race” (Scanlon 2008: 71). These two claims are plausible and widely accepted, but they call for explanation. Why is it that in some cases of discrimination, agents' bad attitudes make otherwise permissible actions wrong? Why doesn't this imply that otherwise permissible actions generally become impermissible when agents act on bad attitudes?? Together, these questions produce a puzzle which existing accounts of wrongful discrimination have not solved. We argue that the solution comes from appreciating how the manifestation of bad attitudes in action is a central constituent in the unjust social condition to which discrimination subjects members of subordinated groups: the deprivation of positive moral standing.