Do you even know what "misgendering" means? Would you care to point me to what posts "misgender" somebody? I've been reading the replies here and I haven't seen anybody misgender anybody else. I might have glided over those parts you see so clearly, or you might just be making up words and definitions, like that twitter person and their "transmisogyny".
Here are some definitions:
http://www.oxforddictionaries.com/definition/english/misgender
http://en.wiktionary.org/wiki/misgender
Calling a trans woman "he" or "it" when their preferred pronouns are "she/her" is called misgendering. Transmisogyny is basically the intersection of transphobia and misogyny: misogyny that trans women face primarily because of their trans status. This isn't very difficult to understand.