Hi Dave, seeing your update my thoughts are as my reply to your original post.
Your comments were not racist in my opinion, how could it be when this phrase relates to a situation and not to a person. Can I suggest that those who disagree read the definition of racist which is only applicable to a person, not a situation.
I think you have been the victim of power play and politics. As I stated before, you don't need this petty mindedness, especially as you have volunteered your services. Their loss, not yours.
All the best, please do not feel bad, you are better off out of it, I would not be surprised to hear that something much better is just around the corner, these things do usually work out for the best!
Sue