Again, from the link in the OP:
“Sexual orientation and gender identity resist explanation by simple theories. There is a large gap between the certainty with which beliefs are held about these matters and what a sober assessment of the science reveals. In the face of this complexity and uncertainty, we need to be humble about what we know and do not know,” it said.
Apparently the researchers responsible for that statement have never read this study:
http://www-psychology.concordia.ca/fac/pfaus/Pfaus-Kippin-Centeno(2001).pdf
We know it comes from conditioning. And that study found it was from SOCIAL conditioning. Which means if you change the norms within a society, the next generations will learn to be what that change is and themselves "orient" that way. Which of course was the game plan from day #1 and why "teaching it in the schools" was considered an item of major importance to the LGBT cult leadership running the legal machine.
I've always said that these creeps know exactly what they're doing, HAVE read studies like the one from concordia and that the entire game plan reads like a police report on a gay predator "grooming" children he intends to molest, writ-large.