She doesn't open with "All white men are terrorists." The title is "Tabletop gaming has a white male terrorism problem." She's not saying ALL white men are doing this, but that all the ones that are doing are white men.
Post #109 collates all the examples where the author does mass generalise. They then contradict that at the end which leads me to believe they don't actually mean to and read into it deep enough and you see that they aren't trying to blame all white guys for the way they've been treated. But anyone who's not already one of the converted is not going to do that. They'll see parts such as "#allmen are complicit in the harassment" and you've lost them. They'll write it off as a piece by one of the geniune bigots (which exist in every church) and either be unmoved or driven further away.
Edited by Blue Five