You are confusing kicking them out, with allowing them to join in the first place. Individuals with an amputation can not join, but they can still serve, for a great many years even, if they got the amputation while serving. Not unlike how I repeatedly injured my knees while serving. My knees now would not let me join, but because I am already in I am allowed to continue serving. But nobody has yet to show us how being transgendered is a military caused trauma. In fact, from what most people who support it try to claim it is how they are and natural. Therefor it is impossible to be service connected.
Who knows. Those records are sealed. Judging by how afraid they are of guns, an accurate guess would be around 90% of liberals