I never watched it in full i saw a little of it but I heard they put some stuff in favor of Xtianity in there and the claim that Hitler was xtian. But it still serves a good purpose of getting people to question things so its not totally bad.
Read the thing on slave revolts of the xtians by Cobra recently.
This is a first step for some people eventually some will come over to our side or at least generic paganism which is good that will be the state religion of the future. I doubt anyone not into xtianity already will be convinced by this documentary to become xtian. So its not a huge concern for xtians it might make them less in favor of the jews or more in favor of Hitler. The more positive stuff about Hitler and Nazism the better. We can try to counter the propaganda ourselves that is our job.
