It is measured by that which serves us and makes more — not less — of us.
I cannot agree with this premise if I understand it correctly.
There are things about every person that need to be corrected and/or removed.
That whole "if they right hand offend thee" concept.
Also, what makes you think that you have the power/authority to make this determination?
Tell that to a Muslim, a Hindu, or a Buddhist. Or even someone from a very different culture. “Sin” is a fluid concept.
I also disagree with this premise.
To sin is to violate an eternal law.
So, unless eternal laws are also "fluid" (they aren't) then sin is not a fluid concept.
People may disagree or misinterpret, but that doesn't really change anything, does it?
And that truth comes to us colored by the cultural lens and biases of those who wrote the texts.
Sure, but that doesn't change the fact that these is an objective non-colored "truth" right?
What we believe won't change that truth.
I believe homosexual behavior to be sinful, independent of any culture or text.
What kind of activity? Rape? Incest? Pedophilia? Or normal, legal adult behavior?
You can't conflate what is "legal" with what is morally right. They often aren't the same thing.
As to your question, all of the above!
Any and all sexual activity between members of the same sex is sinful.
Hardly.
I'm grounded. Consistent. Stable.
You, on the other hand, seem to be tossed around by anyone'es subjective opinion of reality.
See above. This “information” comes to us through several lenses of bias.
Take all this information to God. Just you and Him.
That's what all of us should ultimately do with any new information we receive.
You can sort out what is or is not true by appealing to Him and receiving the confirmation of the Holy Spirit.