It is not bullshit at all.
I asked how it was determined that homosexuality is an abomination, and I was told it doesn't matter how they determined it.
You decided that the Old testament is relevant. When other laws from the OT are pointed out we are told they OT doesn't count.
Leviticus 18:
22'You shall not lie with a male as one lies with a female; it is an abomination
Romans 1:
26For this reason God gave them over to degrading passions; for their women exchanged the natural function for that which is unnatural,
27and in the same way also the men abandoned the natural function of the woman and burned in their desire toward one another, men with men committing indecent acts and receiving in their own persons the due penalty of their error.
28And just as they did not see fit to acknowledge God any longer, God gave them over to a depraved mind, to do those things which are not proper,…
1 Corinthians 6:
9Or do you not know that the unrighteous will not inherit the kingdom of God? Do not be deceived; neither fornicators, nor idolaters, nor adulterers, nor effeminate, nor homosexuals,
10nor thieves, nor the covetous, nor drunkards, nor revilers, nor swindlers, will inherit the kingdom of God.…
18Flee immorality. Every other sin that a man commits is outside the body, but the immoral man sins against his own body.
19Or do you not know that your body is a temple of the Holy Spirit who is in you, whom you have from God, and that you are not your own?…
Jude 1:
7just as Sodom and Gomorrah and the cities around them, since they in the same way as these indulged in gross immorality and went after strange flesh, are exhibited as an example in undergoing the punishment of eternal fire.
8Yet in the same way these men, also by dreaming, defile the flesh, and reject authority, and revile angelic majesties.…
There are plenty more, do you want them?