I clicked on the link and read the controversial article.
Let me point this out to you. Worshipping on Sunday instead of Saturday is no longer a sin, as the article states. We Christians are not obligated to worship God on Sabbath day, since we are under the Grace of God. Even the Holy Bible states so.
For more information, read this link.
http://www.bible.ca/7-Col2-14-16.htm