I'm not sure if you were intending on this thread to be commented on, but I have a few things I feel need to be said.
I am not a religious man, nor am I disbelieving or discounting anyone elses beliefs. But I wouldn't say that I thought your song was racist in any way, it was a thought put forward "What if.." Putting myself in your shoes, if this was my song, my intention would be to make people think, to make people take a moment to look at something in another way, if this was your goal then I think the problem could be simply that it could use more work. I think your goal was goal was misinterpreted simply because you are not a master musician and lyricist (is that a word?) And I would challenge many people here to create a song about hitler that didn't offend at least 1 person. So by this I mean that there is a very, very fine line for these types of songs, and a LOT of work has to be put in to make sure that every little detail and element cannot be misinterpreted.
Also, I try not to judge people based on internet experiences, this is the same for email, or facebook, or whatever. This is all too vague and it is only a very small piece of the person that you are speaking of, the human interaction and connection is not there as it is in person. I don't think you are a bad person, but I would probably not play the song for people again until you have really worked at it, and maybe put forth an explanation of your intentions so that people may help you with constructive criticisms.