Where did I say manipulation of nature is wrong? I never did. What I said is that even WITH manipulation, it can't be achieved.

No need to put a straw man up every time I reply to you.

For the sake of the argument, I'm gonna ask you something though. How far can this "identification" thing go then? Is it only limited to gender? And if it is, why? Is it a crime when a hunter shoots someone who identifies as deer?

If that isn't how you were trying to portray yourself, then I apologise as I understood you differently.

Being Transgender isn't always easy, they are one of the most vulnerable demographics in society.

Manipulation however... If someone transitions from male to female, gets surgery to remove their breasts, takes testosterone which results in physical changes such as facial hair... Change their name, dress like a man, acts like a man, portrays themselves as a man... Then to me. They are a man. Regardless of what reproductive organs they do/do not have as that is none of my business.

Besides, Science is never going to stand still, we are have come a massively long way in hormone and genetic manipulation and that isn't going to stop any time soon... And I hope the Transgender demographics leverage that technology.

Ever heard of the saying... "Walks like a duck, talks like a duck, it probably is a duck?" That applys to Trans people. A female to male trans person who walks like a man, talks like a man, is a man.

If someone identifies as a deer, looks like a deer, acts like a deer... Then they are probably a deer. (Although that a silly comparison to make, we aren't talking life and death here, just toilets.)

I think what makes transgender a real thing while transspecies is not is that there is research indicating that in certain ways the brains of trans women are more like cis women then they are cis men and the same is true of trans men.  There is no such research that indicates anyone has the brain of a deer and thus the "well what if I identify as a toaster, will you shove your morning bread into me?" is just a ridiculous analogy.  If research is done that shows people who see themselves as another species have brains with activity or structures similar to those of the species they believe they are then you can put them in the same category as transgender. 

On the other hand, those studies also prove that while the brain is similar, it's not the same as the cis brain, thereby only supporting my statement about there being a biological disparity even after manipulation.

That's true, it's not as reductive as "female brain trapped in a male body" but there are real physical factors that create this phenomenon which give the transgender concept more validity than the transdeer example presented.  

Well I wouldn't consider telling those with a dick to use the mens room and those with a vagina to use the womens room to be discrimination so...

That's your opinion, mine is different. What is so hard to understand? I don't want or feel comfortable with someone who was born with a penis sharing a bathroom with my girlfriend, mom, daughter, or niece.

That's true, it's not as reductive as "female brain trapped in a male body" but there are real physical factors that create this phenomenon which give the transgender concept more validity than the transdeer example presented.  

Instead, you'd rather they share a bathroom with somebody like this: 

Got it. 

Not sure what your point is. He is a man, so I would share the bathroom with the creep. I would much rather he share the bathroom with  me than my daughter, would you not?