I started to think it might be because I am constantly told by the people around me "they were born like this". So I started to think "probably a mental illness then with a deformity in the head".
As for why I used the word "transgender" its because I'm trying to refer to the people who are described as such.
I get the impression you're a younger fellow, so I guess I'm safe in assuming that the absurd novelty of the term "trangender" does not strike your ears the same way it does mine.
"He who controls the language controls the argument" goes the old maxim. Don't give your enemy a cudgel to wield against you by accepting his terminology uncritically and adopting it into your lexicon. For example, those who advocate the murder of unborn babies legitimize their Satanic position by calling themselves "pro-choice," but we know better - we know there is no such thing as a legitimate "choice" to commit murder. Therefore, we deny them the legitimacy they seek by refusing to use their chosen self-appellation.
Same thing with "gαy" or "LGBT" or even "ɧoɱosɛҳųαƖ" to refer to Sodomites. All of these terms were coined by the Sodomites themselves, for the same reason the abortionists call themselves "pro-choice" - a desire to legitimize their evil inclinations and practices. "Sodomite" is the proper, Traditional term to use... Likewise, the usual derogatory terms are also fine and acceptable because these people commit unspeakably evil and wicked acts and therefore richly deserve to be derogated. These people are our enemies, and in war one does not meet his enemy with rose petals and feathers, but with force of arms.
"Transgender" is wrong on numerous levels. First of all "gender" is a concept invented by feminists and sods in an attempt to differntiate between biological sex and "psychological gender." No such distinction exists - human persons are either of the male sex or the female sex, and that applies to the whole person (mind, body and soul). "Gender" applies to grammar, not persons. And dressing like the opposite sex and even mutilating one's organs to mimic those of the opposite sex do nothing whatsoever to change the person's sex.
Up until very recently, men who dressed like women were called "cross dressers." That description fits the bill, and the fact that it offends those it describes makes it that much better, in my book.
And the next time some Sod demands that you accept him as having been born this way, ask yourself (and him): Are adulterers "born that way?" Are bestialists? Self-abusers? Pederasts?
God does not assign men an inclination to a particular sin at birth - we develop those wicked habits ourselves. Even the "science" of the materialists backs us up on this - try as they might, they have never found the "gαy gene" and they never will.