The reason the church is mad at Blake is a little bit complicated, but they apparently feel that he's a "vulgar adulterer" and that he's partially responsible for some states legalizing gay marriage.
The Voice judge hasn't kept quiet about his feelings, writing an angry response to them when they tweeted about picketing his concert.
Even Miranda jumped in to tweet support her hubby with a more G-rated statement, writing, "It's such a shame when people use God as an excuse to get publicity. And they couldn't be farther from God.. I'm glad I know maker so well."
As Blake was coming out of Usher's birthday party in West Hollywood last night, he went on the record, making sure Westboro Baptist had heard his message loud and clear.
Watch the video below to see what he had to say...