Just to address a couple of your points.
To say that gays can't get married because it was in the Bible
The Bible does not address gay marriage. There is nothing in the Bible about gay marriage. Granted, the Bible does seem to indicate that homosexual practices are considered sin, just as stealing, lying and adultery are sin. But gay marriage is not addressed.
forces their religion on others
Nobody is forcing Christianity on anyone else by opposing gay marriage. Many gay marriage opponents are not particularly religious. What would be forced on everyone is simply a law not allowing gay marriages. It does not force religion on anyone. It does force people to obey a law they may not agree with, but how is that different than any other law that the government passes?
Hindering peoples right of religion
No, it does not. You have no idea what you are talking about.
it takes away their liberty and pursuit of happiness
At least you have one statement that you can reasonably argue. Although opponents of gay marriage would disagree and also have a reasonable argument. You cannot take something away that has never been. So I could argue that gay marriage opponents are not taking away any liberty or taking away someone's ability to pursue happiness. But at least you would be able to intelligently argue that they are doing so.
How do you think the Court will rule on prop 8
I have no idea. If they strictly follow the constitution, then I think they would rule in favor of prop 8. The constitution, like the Bible, does not mention marriage and thus the regulation of marriage should be left to the states. The people of California voted to live in a society where marriage is defined as between 1 man and 1 woman. So be it. But I expect they will not uphold prop 8. I think they will dodge it all together. But that is another discussion.
And as a bonus just for you, I also believe that DOMA should and will be struck down. Gay marriage opponents cannot have it both ways. You cannot leave marriage regulation up to the states and then argue for the federal government to regulate it.