Manning was a whistlerblower, just like Snowden, with less power and ability for flight to defend themselves.
There was no personal gain ever intended or achieved, yet great personal loss even in the best outcome. They saw something very wrong happening and had little to no way to say "hey there are some incredibly powerful forces in this country doing some very evil things".
The problem is we only treat whistleblowers like traitors legally and Manning's "trial" was a complete scam, zero media coverage allowed on purpose by the government so they could be railroaded.
Any sizable dump of classified documents is likely to have some damning pieces in there but that doesn't necessarily justify blindly leaking massive amounts of documents. I think Manning would have gotten a more favorable response by more people if he had been just a bit selective in what he leaked.
Again, I don't have deep knowledge on either of these cases compared to some around here so I'll concede that maybe I'm wrong on some of my facts...?
EDIT: I wouldn't conflate ignorance of her gender and disrespect, it's not anything I've ever heard.
I'm going to be generous and assume that duaneb poster was not closely following the story and is unaware of the above.
Transpersons are always the subject of massive flamewars online, so some folks get really strong kneejerk reactions to misgendering.