"Tough skin is absolutely essential. Racism and bigotry, however, is not only not important, but not wanted, needed, and in my case, I have little tolerance for. "
The only crime here is that something was put into print that is usually just spoken in words. Any one of us who says these kinds of statements or jokes don't go on (and are not laughed at) is not being honest about what we, as humans, do.
Look at the jokes shared on this site. Most are at someone's expense. On one level, including ethnicity (or disability or, or...) in a joke means the listener gets a visual hook to hang the joke on...it gets vivid. No judgment, that's just what happens. The joke has a face.
Putting it into writing, however, does make it a more public and permanent record of one's failings when it comes to being a professional, which in our business means having the confidence of the public -- that means everyone. The writer's credibility as one sworn to heal without prejudice could more readily be called into question.
I, personally don't question the writer's integrity. I prefer to laugh at all of human balderdash!