Germany is ready to host the largest international meeting, G20, within the shadows of a violent "welcome to hell" protest.Demonstrations are being organized by anti-capitalist militants and, ahead of the July 7-8 summit, tensions are rising in the country's second largest city, Hamburg. Amid the protests acts of vandalism were reported including 12 luxury sport cars being arsoned in the early hours of the morning, the German city's fire department said on Thursday.