[citation needed] After the 2003 publication of her Fools' Crusade: Yugoslavia, Nato, and Western Delusions, Johnstone became known for her claim in the book that there is "no evidence whatsoever" that the Srebrenica massacre of the Bosniaks was genocidal.
[3] The book was rejected by publishers in Sweden,[3] prompting an open letter in 2003 defending Johnstone's book—and her right to publish—that was signed by, among others, Noam Chomsky, Arundhati Roy, Tariq Ali and John Pilger.
The signatories stated: "We regard Diana Johnstone's Fools' Crusade as an outstanding work, dissenting from the mainstream view but doing so by an appeal to fact and reason, in a great tradition.
In the book "and elsewhere she had argued that the numbers of deaths had been exaggerated, that many supposed victims were in fact still alive somewhere, that Srebrenica had actually been an armed camp, that the Bosnians had deliberately let it be overrun hoping for a anti-Serb propaganda coup, that there had been some regrettable 'revenge' killings, as can happen in wartime".
"[9] In April 2012, she wrote for CounterPunch and elsewhere about the first round of the French presidential elections a few days earlier and identified Front National leader Marine Le Pen as "basically on the left".