Earlier quoted context omitted.
"Mr. Eich had their way, then roughly 8% of the relationships we’ve worked so hard to bring about would be illegal" I don't know much about Eich, but I don't think he was working to make same-sex relationships illegal (like Uganda or nigeria). it does okcupid no credit to infer that he does (using weasel words like "people like Mr eich".) saying "eich wanted to prevent 8% of our customers from enjoying the fulfillmen…
Marriage is a possibility for a relationship if you're straight. To deny that for gay people is to deny them the full legal potential of their relationship. edit: added legal before potential
That's the real question here. This issue isn't about hate and dehumanization -- I mean, there's way too much hate and dehumanization, certainly, but not enough to drive electoral victories we've seen. The question is just an extension of the social upheaval of the sexual revolution of the 1960s. The real remarkable thing is that it's been simmering for so long without coming to the forefront yet. Probably many people thought that it was substantially settled, on account of this quiet, but it looks more like the two camps just quietly went their separate ways.
This is also why religious groups outside of Westboro mostly talk about focusing on the family and the social problems associated with single-parent households and divorce. (If you are not a member of these groups or do not have friends and family who are members of these groups, you are probably unaware of what this advocacy looks like. See also: the entire public policy of the Catholic church on this matter.)
FYI: This is how you can have an eminently nice person with nothing but respect for the intrinsic human rights and dignity of homosexuals, but who still votes for Prop 8 or Amendment 1 or a similar measure.
And you know what? What goes on between two people in private of their bedroom is nobody's business. What benefits the government makes available to people, through spending the public purse or giving people tax breaks or mandating certain sorts of treatment... that kind of is peoples' business. It's a public-policy question, and structuring public policy one way or another impacts society in several ways - including, in some jurisdictions, making your ability to operate as a business contingent on you performing some services that you might not want to perform (cf. New Mexico photography etc etc).
(Postscript. No particular stance for or against Proposition 8, or for or against Amendment 1, or any other public policy recommendation, is hereby endorsed. The following ideas are hereby endorsed: Gay people are human beings and deserve a substantially identical set of human rights and dignity as any other human being is entitled to receive. People who treat them otherwise may be some sort or another of monster. The extent to which these rights overlap with public policy in the matter of issuing marriages is controversial. Voters who support Amendment 1 or Prop 8, electorally or fiscally, are not monsters for doing so. Pluralism is good and it would be great if we all had some way to get along. Maybe we can start with more understanding.)
(Post-postscript. Added adoption to the list of misc. benefits as it is of special relevance as a way for a married gay couple to raise children.)