History shows that he was born into a Catholic family but that he rejected Catholicism/Christianity. There are a lot of articles, but this one makes that specific point.
"Hitler was also born into a Catholic family, but he rejected Catholicism and in most ways he rejected Christianity in general. On occasion we have read people claim that "Hitler was a Catholic" or "Hitler was a Christian" in a meaningful way, implying that Christianity or Catholicism was the primary impetus for his Nazi reign. Such claims are simply vitriolic attacks occasionally voiced by ideologically-inclined anti-Christian, anti-Semitic or pro-Nazi people. Historians agree that Hitler was pointedly anti-Christian."
(snip)
"The upshot: a ton of evidence that Hitler sought to wipe out Christianity just as surely as he sought to wipe out the Jews."
thanks for link. It will come in handy.