David Barton, the founder of the Texas-based WallBuilders, has said that Christians cannot drink Starbucks coffee and “be biblically right.”

Barton made his claims during a service at Whitesburg Baptist Church in Huntsville, Alabama.

“Starbucks is pouring all this money into destroying traditional marriage,” Barton told the audience. “The question is, can a Christian give money to a group he knows will use it to attack what God supports? If you know that when you buy a cup of Starbucks, 5, 10, 15 cents is going to be used to defeat marriage, can you do that? The answer is no.”

“Biblically, there's no way a Christian can help support what is attacking God. I'm sorry, you've got to find some other coffee to drink. You can't drink Starbucks and be biblically correct in this thing. It's just a real simple principle.” (The video is embedded on this page. Visit our video library for more videos.)

Last year, the National Organization for Marriage (NOM), the nation's most vociferous opponent of marriage equality, launched a boycott against Starbucks after it endorsed passage of a marriage bill in its home state of Washington.

(Related: Starbucks' Howard Schultz defends decision to back gay marriage.)