You asked for specifics. Here's one for you to consider. The only new text I have here at home representing the NCTM standards is the "Integrated Mathematics" book from Houghton Mifflin. Very hot book in these parts. Some things to recommend it, other ways not very teachable. This book appears to be written by a committee for a committee. In my opinion, very unteachable, but beautifully produced, pretty pictures, perfect for some textbook adoption committee, probably more adept at politics than math.
Anyway, under "multicutural connections" there are 107 citations for different pages. This appears to be the most listings for any topic, except for "writing" which is pretty close. Typical of other listings: "slope", 10 listings, "square root", 7 listings, and "quadratic formula", 1 listing. Now some people might think this is great; I don't really know. But my proposition was that liberals have pretty much set the agenda for our texts. And I haven't heard Newt, Dole, or Graham crying about diversity and multiculturalism.
Can you imagine the moral outrage if there was a math book published with 107 listings under "patriotism" or "objective codes of morality and behavior"?