I really want to burrow down as to
why you think that transgender people can't raise children well.
A lot of what you have said rests upon the presumption that transgender people are not natural. Well of course they aren't natural, but that doesn't say whether it is right or wrong. This is known as the natural fallacy (see
http://www.logicallyfallacious.com/index.php/logical-fallacies/132-naturalistic-fallacy). For example, I wear glasses. Glasses are not natural, and according to evolution and natural selection I would probably be dead if it weren't for them. Therefore they should be morally wrong, shouldn't they? Thus you can't say something is good or bad because it is natural because natural things are not necessarily good or bad (cyanide is natural too, you know).
Anyway, onto the main point. You have said transgender people can't raise children. Why though? Let us first look at what a good parent is. They are someone who looks after and loves there children, brings them up in a safe environment and protects them from harm. Now can any one of these qualities not be given by a transgender person: the answer is of course they all can. Indeed, give me one quality that a good parent would need that a transgender person can't give. Also, don't give something vague like 'motherly love', give a specific quality. I can't think that you will find any.
Indeed, to adopt children you need to pass very strict and stringent criteria. This means that not anyone can become a parent via adoption. However, anyone can become a parent via sex. Therefore, on average transgender parents should actually be better because there are more stringent checks in place.
You said that people become transgender because they think it is cool. Considering the hate (see your post) that transgender people get (over 50% of transgender youth attempt suicide), why on earth would they do it because it is 'cool'? It is not a choice, and even if it were that would not make it less valid.
You also said that it means they are deceitful because people will be attracted to them. That is like saying all gay people and lesbians are liars because some straight people might like them. In fact, it is like calling straight people liars because some
gay people might be attracted to them.
Finally, having more transgender people does not encourage straight people to become transgender. You have given 0 evidence for this assertion. If it were true, then surely the opposite would be true as well. That is, since transgender people are surrounded by non-transgender people then they would be encouraged to be non-transgender too. Yet clearly we can see this is not the case.
A lot of your post deems things wrong because you do not like them. That does not make them wrong - it simply means you don't like them which is a key difference.