The poster's text: "Long live Germany!"
David Ogilvy was an influential British advertising executive. This quote is from one of his most famous books, Ogilvy on Advertising (1983)
"Nobody suggests that the printing press is evil because it is used to print pornography. It is also used to print the Bible. Advertising is only evil when it advertises evil things. Nobody I know in advertising would advertise a brothel, and some refuse to advertise booze or cigarettes."