Religious Bumper Stickers...

Although religion is not something I partake in, I don't worry about people who do or don't carry a faith. That is their choice. But stickers on the bumper of a scabby Nissan Sunny saying 'Believe in Jesus and you will be saved.' - ok, saved from what has to be the first question? And is this not the kind of comment that the church should be avoiding, they surely do not want to be seen to be forcing their beliefs on others, the sticker could be seen in commanding, enlightning or otherwise needless. Why does the driver feel the need to share this with the rest of the driving public?