For this question I am looking for answers from Jehovah's Witnesses, if possible.
In this YouTube video ("The Schoolgirl The Nazis and The Purple Triangles") this lady Simone Arnold talks about how she repeatedly got in trouble in Germany during WW2 because of her refusal to do the Hitler salute.
The video mentions Jehovah's Witnesses points of views about army service and the Hitler salute, but it does not provide much of any references to the Bible. The same thing is mentioned in this article from the U.S. Holocaust Memorial Museum:
While Witnesses contended that they were apolitical and that their actions were not anti-Nazi, their unwillingness to give the Nazi salute, to join party organizations or to let their children join the Hitler Youth, their refusal to participate in the so-called elections or plebiscites, and their unwillingness to adorn their homes with Nazi flags made them suspect.
The Wikipedia article on "Nazi salute" also states (last paragraph under "From 1933 to 1945"):
Jehovah's Witnesses came into conflict with the Nazi regime because they refused to salute Adolf Hitler with the traditional "Heil Hitler" salute, believing that it conflicted with their worship of Jehovah. Because refusing to salute Hitler was considered a crime, Jehovah's Witnesses were arrested, and their children attending school were expelled, detained and separated from their families.
What I am curious about is the reasoning against these smaller acts of loyalty to the "state" or ruler, such as the Nazi salute. After all doing this salute did not seem to be a problem for most Germans, a vast majority of whom were baptized Protestant or Catholic.
So, assuming that the Jehovah's Witness reasoning comes from their interpretation of the Bible, I would like to ask:
What were (or are) the Jehovah's Witness arguments against doing the Nazi salute?