The caller in question was referring to Nidia Diaz, former commander of the El Salvadoran guerilla group FMLN. Not suprising to see her name associated with like minded fellow travellers.
Here's a little info on Nidia Diaz...
Nidia Diaz of the FMLN in El Salvador, was previously a guerrilla commander in the armed struggle against the US backed military right wing dictatorship in that country and through this struggle gave the people hope and courage to win back the control of their country.
When elections were held in the 1990s, the FMLN won enough seats to become a major force for social and political change and for defending the rights and the interests of ordinary and working class Salvadoreans.
They have spoken out on the privatisation of state run industries and infrastructure and the Dollarisation of the Salvadorean economy. In March 2004, the FMLN will have their best opportunity yet to win sufficient seats to be able to form a government in their own right.
http://www.cpa.org.au/garchve03/1165letters.htmlThe Guardian November 26, 2003
That Diaz’s group had claimed responsibility for the murders of four U.S. Marines and nine civilians two months before was apparently not an issue for Brim. http://www.frontpagemag.com/Articles/ReadArticle.asp?ID=6878
The FMLN also reverted to classic guerrilla tactics and increased its use of land mines, which it called "popular armament." In mid-1985 the FMLN, in addition to kidnapping or assassinating numerous military and government officials, began kidnapping and assassinating mayors and burning their offices. It also targeted United States military personnel for assassination. In June 1985, PRTC terrorists assassinated four off-duty United States embassy Marine guards at a sidewalk cafe in San Salvador in a massacre that also left nine civilians, including two United States businessmen, dead and fifteen others wounded. According to the FMLN high command, the chief purpose of its raid on the army's basic training center in eastern La Union Department in October 1985 was to kill or capture United States soldiers serving there.
http://www.country-data.com/cgi-bin/query/r-4322.html