It seems like a lot of this comes down to simple confusion of how to identify individuals who have been broadly known more publicly under one self-identification which they no longer identify with. Most people came to know about Manning under the original name, just as I came to know about Prince as "Prince" and not [Unpronounceable Love Symbol]. Confusion, convenience and ignorance does not amount to "virulent hatred" in my book, and it is unfortunate that Manning is not consistently identified with her preferred self-identification, but Wikipedia is an empirical indication of how your average person would identify her, and isn't a claim to "correctness." In time it will reflect the changing awareness of Manning's identity as it is brought to the attention of the public more broadly.