Forty thousand Norwegians flooded the streets of Oslo in the pouring rain to defy mass murderer Anders Breivik after he derided the popular children's song "Children of the Rainbow" as a Marxist tool to brainwash children. The size of the crowd meant that an amazing one in every fifteen of Oslo's 613000 residents showed up to the rally. Underneath a canopy of umbrellas in Oslo's central square, tens of thousands sang the 1970s children's song, which celebrates the very multicultural world Breivik so despises. Similar demonstrations were held throughout the country, in the social media-organized event. After singing, people walked several blocks to the courthouse where Breivik is currently on trail, laying roses on the steps of the courthouse and the building's security fence in memory of those he killed in a bombing and shooting rampage last summer. Inside the court, the 33-year-old far-right extremist, who killed 77 people, remained emotionless as survivors spoke of the horror he had unleashed. While giving testimony last Friday, Breivik cited the song as an example of how the Norwegian school system is an "indoctrination camp" for "cultural Marxism." He also directed venom at Lillebjørn Nilsen for his rendition of the tune, saying "he is a good example of a Marxist who infiltrated the cultural sector; he writes music that is used to brainwash children." "Children of the Rainbow" is a Norwegian adaptation of American folksinger Pete Seeger's 1973 track "My Rainbow Race ...