I'm a little confused. What is so obnoxious about it?
It's offensive to use cartoon characters, in conjunction with their big-media-owned TV networks, to "teach" children, in schools, about diversity. This is especially true given that some schools are turning out kids that can't even read.
It's all about (a) Destroying what real families are, (b) promoting moral relativity, (c) promoting homosexuality and multiculturalism, and finally, (d) reducing any influence of moral absolutes/religion.
Have you looked at any children's school text books in the last 20 years?
Examples: (more or less):
Abdul and Manuel went to the fabric store to buy fabric for their kitchen curtains and covering a couch. If they buy 20 yards of peach velour and 15 years of ecru linen, at 4.75 a yard for the linen and 7.55 for the velour, how much will each length of fabric cost? For extra credit, how many spools of thread will the boys need to complete their home sewing project? Etcetc.
Concepcion wants to be a soccer star, and Ming Lee Jasmine wants to be a nuclear physicist and then a general in the army. What classes do you think they should each take? For extra credit, would it help or hinder their careers if they had children?
La Trina and Devonne each had babies in the 8th grade. One baby is a boy and one is a girl. If La Trina and Devonne each bring their babies to the school day care center so they can continue their education, what are they chances they will each have another baby before they finish middle school?
Etc etc.
Etc etc.