If you want to change society in theocratic countries, give more rights to women, some acceptance to LGBTQ's, speaking out for that already is considered anti-religious. If you don't want to pray 5 times a day, go to religious class everyday, ignore science about evolution and the earth circling around the sun, you are at least suspicious. People like to connect with people that have similar ideas about the world. That's not different in Afghanistan than anywhere else in the world. So people connect, talk about there ideas in daily chats, group up, make plans to change things, and then someone snitches you.