Opponents of school choice like to say that parents are free to choose any school they want, but if it's a faith-based school then parents have to pay for it themselves. This reminds me of something that Jay Greene recently wrote in another context:
So, the state only pays for its own vision of a good education but you have to pay extra if you want to pursue something else. This is roughly comparable to the status of Dhimmis (non-Muslims in an Islamic state) who are allowed to practice a different religion as long as they pay an extra tax. Doesn’t feel compatible with a free society, does it?
No, it doesn't. Sadly, in the Western Hemisphere, only Cuba and the United States do not routinely provide public support for parents to choose a faith-based school.