Lots of things are defined as sins in the Bible- but not marriage between two men or two women.
I am not going to come flat out and say that is a 'lie' as that may be offensive; however, I will point out that the Bible teaches homosexuality is NOT acceptable. It calls it an 'abomination'.
Note you never actually quote the Bible- do you? That way you can make the facts as 'truthy' as you would like them to be.
Leviticus 18:22: “You shall not lie with a male as with a woman; it is an abomination.”
And of course according to the Bible- the penalty for that is death.
Of course eating shrimp is an abomination also
Leviticus 11:10-19: “But anything in the seas or the rivers that has not fins and scales, of the swarming creatures in the waters and of the living creatures that are in the waters, is an abomination to you. They shall remain an abomination to you; of their flesh you shall not eat, and their carcasses you shall have in abomination. Everything in the waters that has not fins and scales is an abomination to you
So are Christians refusing to marry shrimpers? People who serve chilled shrimp cocktails at their weddings?
Remember- Leviticus is where you come up with your term of abomination- so I hope you are just as appalled by those people buying frozen shrimp in the market.
And heaven forbid you deal with people who burn incense:
Isaiah 1:13: Bring no more vain offerings; incense is an abomination to me.
Wait- what is this? What is this artist wearing? Pants?
Deuteronomy 22:5: “A woman shall not wear anything that pertains to a man, nor shall a man put on a woman’s garment; for whoever does these things is an abomination to the LORD your God.”
What you won't find in the Bible though is anywhere that calls the marriage between two men or two women- an abomination.