In the wake of PUAHater, manospherist and MRA Elliot Rodger's deadly efforts to prove himself an "alpha male" in manospherist jargon, the manosphere's members have risen up as one to try to spin his actions so that they don't reflect badly on their movement.
If you're wondering whether you're dealing with a manospherist, here is a handy article from the SPLC describing the myths the MRAs cherish.