Just in time for St. Patrick’s Day, a Vancouver restaurant upset a number of Irish people with an image of a poorly poured pint of Guinness.

According to CBC Radio, Dan Olsen innocently posted an image on Facebook asking followers to spend St. Patrick’s Day at his Railtown Cafe restaurants. At first the image seems innocuous enough, showing a little pot of breaded appeteasers on a wooden block, next to an overflowing pint of dark Guinness ale. But it’s that last bit that seems to have started a minor international incident. 

The morning after Olsen posted the photo, he began being inundated with angry messages, taking him to task for his careless pour. As a matter of Irish national pride, correctly pouring Guinness is somewhat of an art, and should leave the pint with a thick layer of foamy head, never overflowing. Olsen’s sloppy draught violated most of the rules of properly poured Guinness—and in support of St. Patrick’s Day no less—leading the Irish Independent to call it “sacrilegious.”  

Other response from the Emerald Isle was vicious. Olsen is quoted as saying, “Let’s just say that Jesus Christ was brought into it on more than one occasion. One comment actually said that Jesus wept when he saw our pint of Guinness.”

Olsen, who admitted to the inadequacy of his pour, has tried to make good on his gaffe by releasing a corrected image, and inviting anyone with an Irish passport to a free Guinness and shot of Jameson on St. Patrick’s Day.