The line is arbitrary, it's wherever they say it is at the time. The point is control, not a rational legal framework.

There is no line. This is how the American Holocaust starts.

I guess they are aware that a smaller group of people are contemplating of getting rid of them in a less peaceful way somehow. with this, they can smear trans people, manufacture a reason to get rid of them, to reduce their rights, and also further turn people against each other by claiming that these trans people and everyone opposing maga are terrorists