Breaking the law is against someone's religion? Whose?
I think the typical argument is by analogy to theft.
Exactly where the line between respect for the law and conflict with God's commands lie is a favorite topic for Christian ethics debates, but probably not relevant to the linked article. ;)
Not all Christians have the same interpretation. I was taught in Catholic school that this meant that everything is God's and nothing is Caesar's.
[1] http://en.wikipedia.org/wiki/Render_unto_Caesar...#Modern_in...
2:8 - "The silver is mine and the gold is mine, saith the Lord.
Great answer to a trick question.