Roseanne Barr tried to rouse a lynch mob to terrorize George Zimmerman's parents ... because she wanted vigilante justice after the shooting of Trayvon Martin ... according to a new lawsuit.
Robert and Gladys Zimmerman are suing the comedienne ... claiming they feared for their lives after Barr made angry comments about the Zimmermans on Twitter in 2012 ... and even posted their home address online.
The lawsuit claims Barr intentionally tried to cause the Zimmermans emotional distress and great physical harm, by inciting mob violence.
The Zimmermans claim they were forced to flee their home after Barr tweeted their address. They're suing her for $15K in damages ... minimum.