Tausch, Hewstone, Kenworthy, Psaltis, Schmid, Popan, Cairns, and Hughes (2010) showed that contact with one group can, in some circumstances, curb prejudice to other groups as well. In particular, after contact with one group, individuals form positive attitudes with this collective. These positive attitudes then bias the formation of attitudes towards other groups as well, called attitude generalization.
Tausch, Hewstone, Kenworthy, Psaltis, Schmid, Popan, Cairns, and Hughes (2010) conducted a series of studies to verify these arguments. One study showed that Cypriot Greeks who had often, rather than never, interacted with Cypriot Turks not only formed more positive attitudes towards these Cypriot Turks but also formed more positive attitudes towards residents of Turkey. Cypriot Turks also showed the same pattern of observations in their attitudes towards Cypriot and mainland Greeks.
http://www.psych-it.com.au/Psychlopedia ... asp?id=197
Tausch, N., Hewstone, M. , Kenworthy, J. B., Psaltis, C., Schmid, K., Popan, J. R., Cairns, E., & Hughes, J. (2010). Secondary transfer effects of intergroup contact: Alternative accounts and underlying processes. Journal of Personality and Social Psychology, 99, 282-302.
And hopefully this forum also promotes positive attitudes towards those in 'the other' community (and beyond)........but I won't count on it!