What part do you not understand? Nearly all violence and sexual predation against women - but also against men - stems from mainstream masculine norms and values. The guys who don't participate in that still turn a blind eye to it and watch it happen. Every woman you know, with very rare exception, has been harmed by men over and over and over again since they were young children. When they try to talk about that, they get screamed at, gaslight, victim-blamed, and further abused - often with death threats and rape threats.

In spite of significant social change in recent decades, men continue to grow up with and are socialized into a deeply misogynistic, male-dominated culture, where violence against women—from the subtle to the homicidal—is disturbingly common. It’s normal. And precisely because the mistreatment of women is such a pervasive characteristic of our patriarchal culture, most men, to a greater or lesser extent, have played a role in its perpetuation. This gives us a strong incentive to avert our eyes.

Katz, Jackson. The Macho Paradox (p. 8). Sourcebooks. Kindle Edition.