>Nakagaki’s research also shows the symbol was called the hakenkreuz in U.S. newspapers until the early 1930s, when the word swastika replaced it.
I think further research will show you that Hitler himself never used the word Swastika and always referred to his own symbol as the hooked cross.
I’m guessing that maybe the leading Christian voices of the time were so guilt stricken by what Hitler had done in the name of their religion that they were happy to blame his pathology on him dabbling with obscure alien philosophies rather than admitting that he was just being a “true Christian”.
It has taken a long time for Christian religious institutions to absolve the Jewish people of the crime of “killing Jesus Christ”. Or have they? I don’t know.
For Hitler himself, the motivation to use the hooked cross was probably to symbolise a return to the roots of Christianity and for that he chose the oldest version of the cross he (or his designer) could find.