Much of the acrimony regarding feminism in the tech industry seems to stem from the inherent contradictions in Liberal Feminism, as opposed to Radical Feminism. Radical Feminism holds that gender categories should be abolished, and that the male/female distinction conceals inherent domination and marginalization of women. It is impossible to move beyond the inequalities of the male/female distinction as long as this gender distinction exists. Radical feminists are not "essentialists" -- they think there is no inherent or natural difference between men and women, but rather that men and women are made, not born (in terms of gender categories, rather than biological sex).
Liberal Feminism, by contrast, seeks to preserve the distinct categories of male and female, but to work toward equality between the sexes through reform. In theory, it seems that Liberal Feminism is a reasonable position: men and women can be "separate but equal" as long as we have the right laws. But in practice, the inherent contradictions of this theory become apparent quickly. The first and most obvious problem is, if men and women are different, who decides what "equality" means? There are essentialists who claim that women have different needs from men, and that our concept of equality must take those needs into account. In order to make sense of this claim, we need to have a clear definition of what a woman is, what women want and need, and how these wants and needs differ from men. But who has the authority to answer these questions? Not men certainly, and not individual women talking about their own personal needs and wants. What we end up with is a frenzy of people, all claiming to represent "women" as a universal category, and denouncing everyone else as unqualified to speak for "women" universally. It is impossible to resolve this situation; the debate quickly spirals into incoherence. Radical Feminism, by contrast, offers us a way out by rejecting the very categories which give rise to these irresolvable contradictions.
TL;DR: Radical Feminism says to gender what we all want to say to everyone involved in gamergate: JUST FUCKING GO AWAY.