Dangers of the Churchmosquagogue?

Is the way to peace to construct buildings for professors of Christ and followers of Muhammed to get together? The German government is planning on constructing a building in Berlin called "the House of One." It is to include a Jewish synagogue, Greco-Roman church, and an Islamic mosque. It has been called a 'churchmosquagogue.' Is each way to God a good one as a rabbi associated with this project has said? Is this another step towards 'Chrislam'? …