Can you provide specific objections to the pages you linked?
(Also, no one can edit President Bush's entry right now... apparently someone has been vandalizing it, so it's been "locked")
The Kwaanza article reads like a PR piece put out by its founder. Even the section about the disputes about its origin and its founder read like a spokesman for the its founder wrote it.
The abortion page is better, but it still slants in favor of abortion (if actually read the article).
You can edit without signing up (again, sign up is anonymous but necessary to have any impact on the site), but that is a waste of time as you will be blocked from controversial articles and won't be taen seriously on pages you do edit.
Here is a sample of the bias. This portion of the article is supposedly addressing the concenrs many have about the holiday. However it is very slanted (and even has a crappy style).
Controversies
Kwanzaa is a holiday not without controversy(better: Kwanzaa is controversial), as various segments of American society challenge it on grounds of its authenticity and relevance (Better:and some question its claimed authenticity). Some criticize the appropriation of the Jewish menorah, which is renamed the Kinara in Kwanzaa. Although it has established a hold in American society, it is often attacked by proxy through its founder, a convicted felon who has a checkered past (Better: Many note that the founders is a felon, marxist and former leader of a violent black seperatist organization.). According to Camille Jackson, Staff Writer at www.Tolerance.org, this is done as a means to undermine its powerful message (bloggers are not to be quoted per wikipedia policy). Author Sara McGill sums it up most succinctly, in her book Kwanzaa (2005), when she says (This entire section is not addressing the controversy, it is praising Kwanzaa as wonderful and criticism as ignorance),
..."While the observance of Kwanzaa has spread to other countries, there are many people of African descent who do not know the purpose of Kwanzaa or how to celebrate it. Others refuse to celebrate Kwanzaa because it is not a true African tradition. Yet, for the millions who observe it, the holiday emphasizes the strength of African history and the beauty of African culture" (Jackson, p. 2).