The joke is on you, because the traditional nativity scene is rife with very non-PC, stereotypical, racist images, and should be forcibly changed to protect impressionable young people.
First of all, the whole idea of the Virgin Mary is wrong. How do you or anyone else know for sure that she was willing to be "knocked up" by God? We propose replacing her with someone who truly enjoys intimate relationships, "Mabel The Happy H@@ker". We want to stress to young girls that there is no shame in getting physical enjoyment from sex, a notion the Virgin Mary obviously rejected.
Next, we don't approve of Joseph's profession, nor his name. Being a non-union carpenter reeks of selfish independence. We want to replace him with Gabe The Union Plumber. Please don't get technical with us. We fully realize they didn't have plumbing back then, but we're not going to senselessly handcuff ourselves to conform to some literal interpretation of history. Leave that for you narrow-minded Conservatives.
The Three Wise Men is absolutely the most objectionable part of this nativity scene. We want school children to feel good about themselves, not obsess over how little they know compared to smarter people. Honoring high intellect will simply injure the self esteem of many children.
Also, although two of the wise men appear to be ***** or at least dark skinned, we find it an appalling lack of diversity. We want to change the profiles completely from Gaspar, Melchior, and Balthasar to something that promotes the spirit of diversity, rather than the literal diversity. Hence, these men will be renamed, "Leroy, Pablo, and Loquitia" (yes, we are changing the last one to a woman; intelligence must not be typecast as solely a male characterisitc).
We have other changes in mind, but we don't want to remove all the surprises. We encourage you to visit our exciting new nativity scene, where we will also have a Kwanza display, and several Middle Eastern religions represented. We will leave these intact. They do not require any tweaking to be diverse.