As a rule, the Christian church has always been against suicide. There are so many people that get all het up in Church by how this worlds is full of sin and evil that they might decide to off themselves and avoid the wait to see Jeezus. You cannot maintain a decent church if all the parishioners kill themselves. Even if every one of them got to be with Jeezus immediately, the rest of the world would never know and attendance would drop of immediately, with no one to feed the preacher.
There have been a lot of suicide cults throughout history, but it never works out that they can stay in business for long.