His article in August in the tabloid Aftonbladet that alleged Israeli soldiers stole and sold body parts of dead Palestinians had led to diplomatic tensions between Israel and Sweden. The newspaper later said the story lacked proof. Israel has demanded that the Swedish government condemn the article that it has labelled an anti-Semitic "blood libel." But the government in Stockholm has refused, citing the country's tradition of freedom of speech.
One of the organisers of Monday’s conference defended the decision to invite Boström, saying that the Swede would have to explain in front of a hostile audience why he publishes defamatory articles on the basis of rumours.