I think we can safely say that Nazism is inconsistent with Christ's teaching. But as the article explains, Hitler's support, when broken down that way, was more among Protestants than Catholics.
There's no way that the "article explains" that or any such thing. The article never mentions Protestants or any other religious group, or even the percentage of Catholics backing the National Socialist Party prior to 1925. Catholic support was in decline by 1923, because the Nazis turned their propaganda focus elsewhere:
This coincided with an upsurge in anti-Catholicism in the other folk movements in Munich that also affected part of the Nazi party. According to Hastings, in this period many Catholics left the Nazi party, and those who remained did so by sacrificing their Catholic identity. The Catholic priests who had joined the party also left. In fact, in the fall of 1923 the Archdiocese of Munich-Freising had forbidden them from attending meetings of the Nazi party.Once re-founded, the previous Catholic orientation was reversed and in large part replaced Christianity with its own set of martyr figures drawn from the failed putsch. From that time too Hitler no longer portrayed himself as a believing Catholic or even as an advocate of Christianity, Hastings affirmed.
With time the Nazi movement became more and more overtly anti-Catholic to the point where the Nazis strongly opposed the establishment of a concordat between Bavaria and the Vatican. They were also openly critical of the papal nuncio Archbishop Eugenio Pacelli, the future Pope Pius XII. The German bishops were frequently attacked in Nazi publications, particularly Cardinal Michael von Faulhaber, who just prior to the 1923 putsch had spoken out in defense of the Jews.