I don't think she is drumming up any support. Asking for polite and decent conversations without being called a 'cry baby' or being asked to 'go back to kitchen' is not political knife fight, it is basic courtesy in a public forum IMO.
Many of their complaints are the same complaints Sarah posted, so it does seem reasonable (to me) to assume she was one of them. Normally they complain about some project not caring about their feelings, demand change, tear apart anyone who argues against them and then force anybody who disagree with them out. Death threats and emails to peoples employers suggesting they be fired are commonly used.
I don't think Sarah is one of them, because to work for that long on a project requires sharp technical skills, which the social justice warriors don't tend to have as well as a willingness to work with people don't agree with you.
I certainly wouldn't fault anybody for suspecting knives though.
We must be able to defend Linus without attacking anyone criticizing the Linux kernel maintainers. Not everything is perfect on that list.