Funnyman Ricky Gervais -- who has made no secret of his atheism -- recently took to his Twitter feed in the wake of the devastating tornado in Oklahoma to call out some fellow celebs that he felt should've been more tangible with their sympathy.

After MTV tweeted a link to a story about Katy Perry, Rihanna and Beyonce sending "prayers" to the victims of the disaster, Gervais took a break from snapping horrifying bath photos to stir the pot.

And on Wednesday (May 22), he kept going.

Meanwhile, Katy, Rih and Beyonce have stayed mum, refusing to take the heathen's bait. Hopefully they've used some of that quiet time to write a check or two.