In the wake of the Tucson massacre, Chip Berlet wrote an essay at Talk to Action which opened:
The idea that vitriolic political rhetoric can lead some people to carry out acts of political aggression or violence against the demonized targets is hardly controversial among social science scholars. The first step is to identify an enemy "Other."
Now the international media spotlight has turned to those American evangelicals, notably Scott Lively, whose demonization of gay people in Uganda has contributed to a climate of hate, violence, and possibly murder.
Political Research Associates (PRA), which published a ground breaking report on the role of American evangelicals in whipping up anti-gay hate in Uganda stated:
http://www.talk2action.org/story/2011/1/29/152521/878