there are men, there are women
Y'all keep dodging this so I'm going to keep bringing it up.
Even if you adamantly define "gender=sex" there are STILL more options than just those two. They're rare but they do in fact exist.
You yammering online that "there are only two" doesn't change the fact that, for example,
there are people who have XY genes, but their cells don't respond to androgens. These people develop male-appearing gonads which do not become external; their external genitalia appear female, their breasts appear female, their hips appear female, but if you take a microscope to their cells you see XY chromosomes. It's a super-rare condition but when there are four billion XY people on the planet even this super-rare condition comes out to tens of thousands of people.
Who are
you to say to someone who grew up without a penis, someone who developed female body type, someone who has been told all their life "you are a girl," that they are NOT in fact a girl?
don't make my children be apart of your issues
Your children are already part of these issues. They are growing up in a world which has trans people in it. The world is a confusing and complicated place so we simplify things when we can, and then later on we explain that actually there's more to the story.
In elementary school we tell students that you can't take the square root of a negative number. Then when they get to high school we introduce the concept of imaginary numbers using the square root of –1. Are we lying to the 5th graders? Are we lying to the 10th graders? No to both, we're just teaching piece-by-piece.
(Though I will say that young children can be extremely adaptable and understanding. "We thought your cousin was a girl but it turns out we were wrong, he's actually a boy." "Oh okay. Can I have a cookie now?" Not everything has to be a big scary deal.)
Maybe some time in the future one of your children will realize that they themselves are trans. If that happens are you going to disown them, berate them, tell them they're worthless or sinful or an abomination? Or are you going to accept them for who they tell you they are?
What I don't like is being referred to as a "birthing person" "chest/body feeder" and "cis-woman" in order to not offend 0.5% of the population that is transgender.
That is a very fair point and I respect it. Again
your identity is your identity just as someone else's identity is theirs, and when we try to categorize a large group of people there will be some terms that apply better than others. This is a difficult topic and not one I'm very well qualified to discuss. I do tend to agree with your stance—we shouldn't bend over backwards to come up with new terms just for the sake of it, especially when the old terms apply to the vast majority of people. But, but, but. It is difficult and complicated, no argument on that.