Male supremacy has gotten a strong foothold online through men's rights activism (MRA), pickup artist movement (PUA), and the "tradwife" movement. Now SPLC has started naming the leaders on their hate watchlist.
Male supremacy misrepresents all women as genetically inferior, manipulative and stupid and reduces them to their reproductive or sexual function — with sex being something that they owe men and that can or even should be coerced out of them. Driven by a biological analysis of women as fundamentally inferior to men, male supremacists malign women specifically for their gender. Their thinly veiled desire for the domination of women and their conviction that the current system oppresses men in favor of women are the unifying tenets of the male supremacist worldview.
Here's a stomach-churning quote they chose as an example:
"Make rape legal if done on private property. I propose that we make the violent taking of a woman not punishable by law when done off public grounds….If rape becomes legal under my proposal, a girl will protect her body in the same manner that she protects her purse and smartphone…. After several months of advertising this law throughout the land, rape would be virtually eliminated on the first day it is applied."
— Roosh V., "How to Stop Rape," Return Of Kings, February 2015
• Male Supremacy (Southern Poverty Law Center)