This is absolutely insane – and perfect evidence that people who complain about use of the word “privilege” should really shut up, because I can’t think of a better example of behaviour stemming from belief in one’s own privilege to be a total dick.
(See also: the culture of gamer “ownership”.)
EDIT TO ADD: In comments, switchnode has pointed out that the MPOC blogger also has a personal history of being at least moderately controversial/possibly awful, as well as potentially sloppy in her historiography. My counterpoint is so what.
The criticisms and attacks made on MPOC aren’t about her personal history of internet use – they’re fairly obviously personal attacks and intended to shut her down. Even if they were relevant (and I can’t imagine a scenario where “she was mean first” would be even remotely relevant as a justification in this regard; I mean, come on, didn’t we all learn this shit in kindergarten?), violent threats would still not be justified. Period. End of story. Finito. That Is It.