No, Hitler was not a Christian. Being baptized or using Christian language does not make one a Christian. If anything, Hitler was a forerunner of the coming final Antichrist who will claim to be the ultimate Christian; Christ, exalting himself as god. Hitler embodied this spirit of antichrist. Below is an informative article outlining the evolution of Liberal Protestantism which led to the German Christian Movement encompassing ideas and beliefs diametrically opposed to the biblical teachings of the scriptures.
“In looking back at the theology that marked the Modern Era, it becomes apparent that era ended with the Holocaust. Most historians conclude that the Holocaust was the lid on its coffin. After all, the Modern Era failed to lead humanity to a higher level but instead brought it to the depths of degradation. And Liberal Protestantism, which rejected the foundational beliefs of Christianity and instead embraced Hitler’s ideology, was part and parcel of that failure. Richard Harries, Bishop of Oxford, in his popular work
After the Evil—Christianity and Judaism in the Shadow of the Holocaust, points out that Hitler’s ideology “was not only not Christian, it was anti- Christian.”
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Though Hitler used Christian jargon to spout his venom, his actions opposed the teachings of both the Hebrew Scriptures and the New Testament.”
Did Hitler and his followers carry out a theology that is Christian at its roots?
jewsforjesus.org