Is being gay an intrinsic or God given difference? Absolutely not. Faith and science are in agreement on this. The Founders are with me on this. Do I need to say what Jefferson said or what Washington did?
No they aren't. You don't get to make up science.
There is absolutely nothing biologically essential about the modern social construction of sexual orientation as it exists almost exclusively in Western societies.
Then why do LGBT folks show up in literally every society, including in nations that have literally condemned them to death?
If you're referring to Africa, then that's largely an outcome of colonialism.
People who take gay or lesbian as their identity are specific to the West largely because of a history of strange sexual restrictions. History is filled with people who do things that immediately lead Westerners to label them as "gay". Except nobody in ancient Greece or China or Persia or whatever identified as "gay".
It is entirely a modern Western phenomenon to take mundane sexual acts and turn them into the crux of one's identity and OMG YOU KNOW ITS THE NEW CIVIL RIGHTS WE NEED TO UNITE AS A PEOPLE.
Insofar as there is a "gay movement" in places like Africa and Middle East, this is largely a relic of Western colonial imposition. Africans very understandably view the "gay movement" as a Western colonial imposition. Of course, they fail to mention that their draconian bans on same-sex fun is also a product of Western colonial imposition (British anti-buggery laws to be specific). They are both different socially constructed sides of the same particularist coin - a strange sexual puritanism that once convulsed the West.