Let's give this a try:
Jews are warm and energetic. They need approval from others to feel good about themselves. They are hurt by indifference and don't understand unkindness. They are very giving people, who get a lot of their personal satisfaction from the happiness of others. They want to be appreciated for who they are, and what they give. They're very sensitive to others, and freely give practical care. Jews are such caring individuals, that they sometimes have a hard time seeing or accepting a difficult truth about someone they care about.
Doesn't quite work, does it? not for my own ethnicity (Jewish), not for any race... And yet it's perfectly reasonable for an MBTI type. Why?