Wrong. Hitler was already in power.
The Concordat was the Holy See's attempt to get some sort of guarantee for the rights of Catholics in return for peacefully dismantling the Catholic political party, as required by the Nazis (peacefully, or otherwise).
Does your "Christianity" support slandering an innocent man? Because that's exactly what you're doing ...
No --- he was tenuously in power at that time and in dire need of a Concordat to keep him there. And Pacelli's Vatican was only too willing to oblige by making their deal with the devil that guaranteed great financial benefits for the Vatican's prelates. And they enjoyed those benefits throughout the war without interruption.
Pacelli's Vatican was willing to secure the devil in power as long as it feathered their own nests at the same time. And this is Christianity to you???? Is this what you think that Christianity is all about???
Does your "Christianity" support slandering an innocent man?
Obviously your "Catholicism" is unable to discern the difference between innocence and guilt. How many Nazi war criminals escaped to South America through Pius XII's Vatican?
Did Pius XII ever either during the war or afterwards excommunicate those monsigneurs, cardinals, archbishops, priests who were collaborating with the Nazis? or did he reward them with a promotions for their service during the war, like Aloysius Stepinac, the Archbishop of the Ustasha, to whom he gave a cardinals hat after his long service to the Ustasha?
How far are you willing to go to try to resurrect his reputation?