The Vatican has long had a too-cozy relationship with Islam. In my opinion, Catholicism and Islam co-existed in the years following Turkey's last push into Europe about 400 to 500 years ago, by establishing a philosophy like two major corporations seeking to quietly agree on dividing a market. Now, Islam wants the whole pie, and Catholicism cannot grasp why the old hands-off arrangement is no longer working.
If you want to point fingers at recent Vatican leadership, you can start with John Paul 'The Great', who visited a mosque in Syria and kissed a copy of the Koran.
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