Why Christians oppose same sex marriage

Whenever someone opposes same sex marriage he is accused of hating gays and his opinions are often called hate speech.  Proponents of same sex marriage have attacked those who oppose it and have caused some to lose their jobs and have their businesses ruined.  Some people do hate gays but Christians who oppose same sex marriage do so because we care about gays and want to protect them the harm that they will experience.

To see why this is so we need to look at what the Bible says about marriage.  The first marriage was between the first man and the first woman.