You could look at it this way...
My religion is my own. So is the money I've earned. Don't make me pay for things I don't believe in. That would be you forcing your beliefs on me.
Furthermore, as a free man I can take my religion wherever I wish. Having to take it where you want is again you forcing your beliefs on me.
Two edged sword, cuts both ways, etc.
Dawkins on a pogo stick, y'know?
Pete