Several researchers claim that not all of the communications infrastructure, such as the bridges, were targeted, nor were the extensive industrial areas outside the city centre. Critics of the bombing have asserted that Dresden was a cultural landmark while downplaying its strategic significance, and claim that the attacks were indiscriminate area bombing and not proportionate to the military gains. Some have claimed that the raid constituted a war crime. Some, mostly in the German far-right, refer to the bombing as a mass murder, calling it "Dresden's Holocaust of bombs".