"And the rib that the LORD God had taken from the man he made into a woman and brought her to the man. Then the man said, 'This at last is bone of my bones and flesh of my flesh; she shall be called Woman, because she was taken out of Man.' " - Genesis 2:22-23 ESV
Men have an XY genetic arrangement and women have a XX arrangement. Interesting considering the Genesis account has God removing part of Adam and forming Eve. What is not often discussed is that today our genetic code has degraded to the point where as many as 1.7% (17 out of 1,000) people are born intersex or hermaphrodites. That means they have qualities of both sexes but are usually (but not always) a XX genetic arrangement. In the past doctors at times decided to 'make' these children girls by a surgical procedure... sometimes without even telling the parents the situation. Just imagine the confusion of growing up thinking you are one thing when your biology is sending contradictory signals.
It is no wonder that people identify themselves in crazy ways. Genetics and environmental influences have muddied the water so much that the lines are blurred and societies are being forced into making strange decisions. It only going to get worse by the way. 1.7% is today's statistic. That number will only grow as population grows in an ever more poisoned and radiated world.
We aren't going back to the garden. That way is barred forever from fallen men.
So while I agree that darkness and deception are factors they are not the only factors. People are confused and I want to love people and show them the identity that they can have in Jesus. If that means building another bathroom or limiting bathrooms so that they have one occupant at a time then so be it. It is a small price to pay.
"There is neither Jew nor Greek, there is neither slave nor free, there is no male and female, for you are all one in Christ Jesus." - Galatians 3:28 ESV
The identity we have in Christ is not primarily a sexual one. Everyone has a special place. The Bible teaches biblical marriage to be between a one man an one woman and sexual contact is reserved for marriage alone. It is a clear teaching and so it must be our conviction. Love is so much more than sex. We must protect our children from perversion with the clear understanding that our world is changing and they will be exposed to concepts eventually. Will we be kind, loving and firm or backward and intolerant?
In Christ we have liberty and a royal identity. Let's be loving and welcoming to people. Let's teach the Bible as it is written and let God untangle the complexities of each life. He is able. We can't but He can and does if His Son is lifted up in our midst.