She was always a woman; she just presented as a man for many years. The NYT presented the information quite well when they said, "Ms. Manning was still known as Bradley Manning when she deployed with her unit to Iraq in late 2009."
https://news.ycombinator.com/item?id=13422094
You're also very aware that a lot of people are not on the same page with you. Some are trying to figure it out for themselves, some have made up their mind. I think it's commendable that they're willing to do so in a public forum and for the most part civilly, particularly on an issue that has been historically as divisive as this. Let's encourage this discussion in a constructive manner and leave strong, insulting language out of it, regardless of how strongly we may feel about the issue. I completely understand how frustrating it can be when you feel like you're constantly repeating yourself and no one's listening. It would be great if people could be convinced over the course of 30 minutes, but I doubt that's realistically going to happen.
The consistent use of quotes around pronouns, as in "'she'", and use of 'they', as if there is confusion, is a subtle but deliberate way to indicate that the author thinks gender identity is all a bit fake. Its puerile behaviour from people who should know better.