This reads to me like a press release for the Dutch tolerance test for immigrants:

A Cologne brothel touting for clients with a World Cup-themed banner has blacked out the flags of Iran and Saudi Arabia after threats from Muslims.

The giant banner on a high-rise building shows a semi-naked woman and the flags of the 32 countries in the World Cup, which kicks off in June.

The Pascha brothel's owner, Armin Lobscheid, said a group of Muslims had threatened violence over the advert.

He said they had accused the brothel of insulting Islam by using the flags.

First there were telephone threats of violence, then about 30 hooded protesters armed with knives and sticks turned up outside Pascha on Friday, the Koelner Stadt-Anzeiger newspaper reported.

"The situation was explosive," Mr Lobscheid told the paper.