Nobody likes to have a label slapped on them. When people find out that I'm atheist, the automatic assumption is that I'm "angry" and "bitter" toward religion. While it's true that I've had numerous personal experiences as a JW that angered me, at its roots, the anger and bitterness comes from having been denied basic human rights as a person by the JW belief system.
As a consequence, I'm highly sensitized to any trampling on others' human rights. I'm just as bothered when I hear about atrocities against Muslim women in Islamic countries, and supremely frustrated when I see Muslim women in my community accepting their belief system's maltreatment of them - wearing the hijab, for instance, or Muslim women immigrating but being forbidden to learn English by their husbands, or not being permitted to drive or have jobs. It isn't limited to Islam and JWs either. I used to regularly see Mennonite and Orthodox Jewish people, compelled to dress in a certain manner in order to satisfy religious ideologies, not opening up to medical personnel and knowing they had been taught to regard outsiders with distrust.
It's very hard to see other people in the same kind of mental prison I was fortunate enough to escape from.