My parents divorced when I was five and my brother was two. We moved in with my mom, who basically stole us from our dad. We saw our dad every other weekend and the like. My mom married a slightly abusive ass, and as soon as I could I moved in with my dad, only to be in a sitation where my dad's new wife was also an emotionally abusive person. So I was kind of stuck, until my mom finally divorced that idiot she was with and I moved back in with my mom, when I was seventeen. My mom is now happily married, and my stepmom, changed. I can't find a reason or excuse for what my former stepfather did, but my stepmother was put in a situation where she suddenly went from having two kids to having three, then four, then five (none of the supplemental hers), and then her dad needed to move in. It was extremely stressful on her, and sometimes she took it out on the kids. When the kids started to move out, she became a better person, and I can now see why she did what she did, which doesn't make it right, it just makes it understandable.

But I digress. Sometimes divorce is necessary, but it usually is not. A lot of people don't hold to the vows they made before their god, which is pretty crummy.