If God changed his mind

[Kingpin]

I think you misunderstand.

If he had to convince his followers with christianity, what does that say about his followers?

He did not have to convince his followers with Christianity.  He created a propaganda machine and lead with an iron fist.  His first moves as chancellor were abolishing the Reich Presidency and having the army swear a personal oath of unconditional obedience to him as "the Fuhrer of the German Reich and People."  Restoration of order, rebuilding the economy, removal of the scourge of unemployment, demolition of the restrictions of the hated Versailles Treaty, and the establishment of national unity all had wide popular resonance, ranging far beyond die-hard Nazis, appealing in fact in different ways to practically every sector of society. Opinion surveys long after the end of the Second World War show that many people, even then, continued to associate these "achievements" positively with Hitler.