Starbucks is being threatened with a boycott over its support for gay marriage.

The coffee giant last week endorsed a bill that would make Washington the seventh state to legalize such unions. Starbucks is only one of more than 100 Washington-based companies to support the proposed legislation.

(Related: Amazon joins Starbucks, Google, Microsoft in supporting gay marriage.)

Pastor Steven Andrew of USA Christian Ministries on Tuesday called on Christians to abandon Starbucks.

“Christians are upset with Starbucks for turning against God, but we are glad to know that Starbucks doesn't pretend to be for Christians,” Andrew said in a statement.

“This boycott is important because God blesses those who obey Him and judges those who don't obey Him (2 Chronicles 19:2).”

Citing Leviticus 18:22, Andrew stated that being gay is an “abomination,” but added that “Jesus loves homosexuals.”

“I wish every person would receive Jesus' forgiveness for sins by His blood,” Andrew said.

Thomas Peters, a frequent contributor to and the National Organization for Marriage (NOM), also encouraged his followers to give up Starbucks.

“Well, that's it,” he tweeted to his more than 9,200 followers. “I'm not drinking Starbucks anymore … it was making me go bankrupt anyway.”

On Wednesday, the Washington Senate approved the gay marriage bill by a wider margin than expected.