 She began drawing parallels between the two groups of peoples after a 2014 delegation trip to Israel, where Palestinian activist Leila Khaled "defined solidarity as a strategy of connecting struggles of the people in the U.S. against U.S. imperialism and colonialism to the struggles of Palestinians against Israel".Barker also advocates for cultural repatriation rights, human rights, anti-war politics, and environmental issues.With environmental issues, Barker specifically focused on energy policies and conservation issues in relation to indigenous tribes in California.