It is well known that Christians were persecuted in the early days of Christianity and still are in some parts of the world. Nowadays, the fish symbol tells me that the person is an active Christian. That is, not just raised as--but a practicing believer.
The NAZIs used the pink triangle to denote gays and it has been used since then in much the way the fish was used by early Christians. Gays are still persecuted in some parts of the world, but not here. The whole Safe Place motto strikes me as more than a little paranoid. There is plenty of moral superiority thrown in as well--as if anyone else would search for the first available weapon if they happened to discover a gay person.
A nice mix of superiority and ignorance. This one reminds me of an old TV show where the main character was a 30 year old paperboy who lived at home and yet felt superior to everyone around him.
It is clearly trying to insult Christians by punking their symbol and yet is unaware that most Christian believe in evolution.