Pure coincidence, and irrelevant.
Is he-she-it telling the truth?
Are there Judeo-Christian scripture, dogma, doctrine and traditional teachings, that designate homosexuality as an abomination in the eyes of God and Man?
If 'yes', then charges of bigotry may be safely set aside - with prejudice.

Sure...it's "pure coincidence" that bigots have always fought against change? I don't think so. More like, bigots don't change their spots, just their targets.
The same Judeo-Christian scripture, dogma, doctrine and traditional teachings designates the following as "abominations":
- Lobsters, shrimp, clams, octopus, and squidsWhatsoever hath no fins nor scales in the waters, that shall be an abomination unto you. Leviticus 11:12
- Four-legged fowlsAll fowls that creep, going upon all four, shall be an abomination unto you. Leviticus 11:20
- Four-footed flying, creeping thingsBut all other flying creeping things, which have four feet, shall be an abomination unto you. Leviticus 11:23
- Whatever crawls on its belly, goes on all four, or has lots of legsWhatsoever goeth upon the belly, and whatsoever goeth upon all four, or whatsoever hath more feet among all creeping things that creep upon the earth ... are an abomination. Leviticus 11:42
- Sacrificing a blemished sheep or goatThou shalt not sacrifice unto the LORD thy God any bullock, or sheep, wherein is blemish, or any evilfavouredness: for that is an abomination unto the LORD thy God. Deuteronomy 17:1
- Women who wear men's clothing
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
- The hire of a whore or the price of a dogThou shalt not bring the hire of a whore, or the price of a dog, into the house of the LORD thy God for any vow: for even both these are abomination unto the LORD thy God.Deuteronomy 23:18
- Taking back an ex-wife after she's been defiled
(If you get married and then find that you hate your wife because she's unclean or something, go ahead and divorce her and kick her out of your house. After she's gone, if some other guy marries her and also hates her and divorces her, don't take her back as your wife. It really pisses God off. It's an abomination to him.)When a man hath taken a wife, and married her, and it come to pass that she find no favour in his eyes, because he hath found some uncleanness in her: then let him write her a bill of divorcement, and give it in her hand, and send her out of his house. And when she is departed out of his house, she may go and be another man's wife. And if the latter husband hate her, and write her a bill of divorcement, and giveth it in her hand, and sendeth her out of his house; or if the latter husband die, which took her to be his wife; Her former husband, which sent her away, may not take her again to be his wife, after that she is defiled; for that is abomination before the LORD.Deuteronomy 24:1-4
- The work of a craftsmanCursed be the man that maketh any graven or molten image, an abomination unto the LORD, the work of the hands of the craftsman.... Deuteronomy 27:15
- Whatever people value the most
(Like kindness, wisdom, truth, courage, honesty, love, compassion, beauty?)That which is highly esteemed among men is abomination in the sight of God. Luke 16:15
Top 10 Abominations to god
Yes, I'm sure that some homosexual(s) with waaaaaaayyy too much time on his-her-its-their hands, drummed-up this ready-made list of archaic prohibitions that we no longer adhere to, for the precise purpose of pretending to portray these ancient prohibitions of bygone days, as equivalent to the prohibitions against homosexual perversion.
And, I'm sure that some straight folks with waaaaaayyy too much time on their hands, can conjure-up a similar collection of points, without so much as breaking a sweat.
The problem for you, in this context, is - most of those prohibitions are badly dated and haven't been practiced in hundreds or thousands of years on any sort of appreciable scale.
Whereas revulsion and shunning of sexual deviancy and perversion (a.k.a. homosexuality) is alive and well and is reinforced by thousands of years of active enforcement.