Leviticus 20:10
The man who commits adultery with another man's wife, even he who commits adultery with his neighbor's wife, the adulterer and the adulteress shall surely be put to death.
Why use Leviticus just against gay people?
The bible references homosexuality (although not explicitly) at least two times...
"Thou shalt not lie with mankind, as with womankind: it is abomination." - Leviticus 18:22
"The woman shall not wear that which pertaineth unto a man, neither shall a man put on a woman's garment: for all that do so are abomination unto the Lord thy God." - Deuteronomy 22:5
Adultery, on the other hand, is mentioned in all four Gospels and at least ten other books of the Bible. And hell, it's a freakin' Ten Commandment.
Thou shall not commit adultery.
I think God hates adulterers waaaaaaaaay more than he hates gays.
Just sayin.
BONUS BIBLE VERSE :: Matthew 7:5
You hypocrite, first take the plank out of your own eye, and then you will see clearly to remove the speck from your brother's eye.