Sounds like a Trojan-horse situation to me. It does seem dumb that the CDU is ostracizing a decent sized voting bloc. But that's what many thought about the Republican Strategy in the United States. The author would do well to read up on that. Sometimes even subconscious though deeply held feelings about racial minorities infect the political process and cause people to vote against their own interests. We're battling it in the US. If Germany is anything like the US, Germany may have its own version of a Southern Strategy brewing here.