What's so bad about allowing the people of California to vote in favor of a separate-but-equal form of domestic partnership for same-sex couples?

Let's look at the pro-Prop 8 text from the official voters guide:

YES on Proposition 8 does three simple things:
It restores the definition of marriage to what the vast majority of California voters already approved and human history has understood marriage to be.

It overturns the outrageous decision of four activist Supreme Court judges who ignored the will of the people.

It protects our children from being taught in public schools that “same-sex marriage” is the same as traditional marriage.

Proposition 8 protects marriage as an essential institution of society. While death, divorce, or other circumstances may prevent the ideal, the best situation for a child is to be raised by a married mother and father.

The narrow decision of the California Supreme Court isn’t just about “live and let live.” State law may require teachers to instruct children as young as kindergarteners about marriage. (Education Code § 51890.) If the gay marriage ruling is not overturned, TEACHERS COULD BE REQUIRED to teach young children there is no difference between gay marriage and traditional marriage.

We should not accept a court decision that may result in public schools teaching our kids that gay marriage is okay. That is an issue for parents to discuss with their children according to their own values and beliefs. It shouldn’t be forced on us against our will.

Some will try to tell you that Proposition 8 takes away legal rights of gay domestic partnerships. That is false. Proposition 8 DOES NOT take away any of those rights and does not interfere with gays living the lifestyle they choose.

Claiming "the best situation for a child is to be raised by a married mother and father" is false. Children raised in a household led by a same-sex couple are indistinguishable from those raised by heterosexual parents. Study after study has demonstrated this.

Preventing "children from being taught in public schools that 'same-sex marriage' is the same as traditional marriage" however does cause demonstrable harm. Kenneth B. Clark's "Doll Test" tells us that letting proposition-8 stand will damage children who are biologically determined to be attracted to the same sex—telling them their capacity for love is wrong and beneath that of the heterosexual majority.

The mob has no right, in our country, to strip a minority of its dignity. Make a note of it, California Supreme court.