Tony Perkins, the president of the Christian conservative Family Research Council (FRC), has joined the chorus of conservatives calling on Christians to boycott Starbucks over its support for gay marriage, media watchdog reported.

Perkins criticized the coffee giant during his Friday radio bulletin.

“There's more than coffee brewing at Starbucks. There's controversy too,” Perkins told his audience.

“Starbucks is stirring the pot all right, but with a liberal agenda that's got customers shaking their heads. In the fight over marriage in Washington State, the Seattle company is picking sides. Last week, the chain announced it'll join the attack on marriage and endorse homosexual unions. Spokesman Karen Holmes said, 'This important legislation is aligned with Starbucks business practices. It is core to who we are and what we value as a company.' Well, it may be at the core of who Starbucks is, but it's not at the core of who America is. Voters overwhelmingly believe in man-woman marriage – and they've passed 30 straight amendments to prove it. If Starbucks thinks people like their radical agenda, I hate to spill the beans. But people can get their caffeine fix anywhere. So if Starbucks wants to focus on politics, then its profits are on dangerous grounds.”

Starbucks is only one of the more than 100 Washington-based companies that have come out in support of Governor Chris Gregoire's plan to make the state the seventh to legalize gay marriage. The Washington Senate approved a gay marriage bill on Wednesday by a wider margin than expected.

Pastor Steven Andrew of USA Christian Ministries said Starbucks had “turned against God” in calling for a boycott.

The National Organization for Marriage (NOM) has also urged supporters to drop the coffee chain.