The joy of Jesus Christ is in living Him and sharing Him. That's why the Christian faith is always personal but never private. It always has social consequences - and that means cultural and political consequences. Democracy thrives on those consequences. God is good for democracy.
Religious faith creates and sustains good citizenship.
And frankly, that shouldn't surprise anyone. The trouble is that some laws, and the convictions which undergird them, are good. Some are bad. Some are inhuman. In fact, that sort of Catholic self-censorship , especially in elected officials but in individual voters as well, undermines real democracy and can very quickly become a kind of opportunism or even cowardice.