This doesn’t make you a principled christian. This makes you a tosser. Birth Control is vital to a healthy society. Our society has the things it does because we live in a society where we have created artificial largesse through technology and by artificially controlling our population’s growth. Otherwise you just have… places like India. Where everything doesn’t work because there are so many people. India would be kicking so much arse if it had 3/4 of the population. It’s standard of living would be among the highest in the world.
Artificial largesse is the method of western growth. We curtailed our birth rates to an equilibrium so we aren’t as affected by fickle nature of weather and resources reliant on that because we are using less (a lot less) than we actually have of resources such as food and water. Contraception is vital to this.
To have a religious exclusion for christians means a religious exclusion for all faiths.
You would not get your insulin if a Hindu or a Muslim employer decided to apply this level of dickery (Relax, I have NEVER heard of a Muslim or a Hindu refusing to fund Insulin for Diabetic employees. This is just a really christian form of religious dickery).
And it is just that. Petty Dickery.