There's an article in The American Prospect, "Purity Culture Is Rape Culture," that links the brutal rapes in India to purity culture. Some quotes:
“Rape culture,” as young feminists now call this, isn’t limited to India. It lives anywhere that has a “traditional” vision of women’s sexuality. They must be kept pure. While cultural conservatives would disagree, this attitude gives men license to patrol—in some cases with violence—women's hopes for controlling their lives and bodies.
In other words, only virgins can be raped—sweetly white-gloved, white-skinned virgins. Any woman who ever wanted sex—yes, that includes married women who unconditionally give permission when they put on that ring—deserves what she gets.
Connecting the dots between rape culture and purity culture is a recent thing for me, and something I would have scoffed at 5 years ago. Most people within purity culture have never thought these things through to their ultimate implications. They don't realize that the underlying belief system that promotes purity also promotes a very discriminatory view of women. And as long as the women in these cultures follow along, rare few will ever have to face the ugly truth. It's not until women begin questioning and taking control of their own lives and their own sexuality that the backlash against them will come out. And the anger and disgust you will see will reveal their true feelings towards women.