Success of Liberal democracy, capitalism and free markets is an empirical fact. Read some Stephen Pinker, he has lots of charts and graphs and data.
But it is always a good move when you are on the losing side of an argument to dismiss the other person as religious, so debate points to you.
I don't recall anyone disputing the successes of liberal democracy, capitalism, nor the free markets; I certainly don't. Stephen Pinker is not a reliable source, but that doesn't change the first sentence.
If your taking a disagreement with one particular example (the restaurant industry), and portraying that as dissing your entire belief system in capitalism, how can you get more fundamentalist than that?