According to gathering information, that involvement was total. The Catholic Church, the Jesuits in particular and the Nazis had a cozy relationship. There is nothing more telling than photographic evidence. Rumors of this were first circulated by the Jehovah's Witnesses shortly after the fall of the Nazis in WWII. The information was otherwise suppressed until the beginning of the new century and the spread of the internet. As stated, nothing explains history more clearly than the evidence which can be found at;
There is little doubt that this is just scratching the surface and the church has a lot to answer for in the revelations of this and other atrocities such as what happened in the conquest of the New World.