The clip, which has been widely circulating online, shows the shocked reaction as the a man who appears to be the father is forced to wrestle the child from the French clergyman.
As you can see in the footage, the priest tries to comfort the crying little one.
As the baby continued to cry, the priest shocked those present by suddenly yelling at him and slapping him on the face, only to cradle his head again.
He grows frustrated and slaps the baby in his face.
The clip shows the baby being held in a woman's arms as she stood beside another woman and man beside a baptismal font in a church. But in case you're looking for another, here's a video of a priest slapping a baby. I'm going to pour water on the forehead.
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Warning: This video contains violent content that may be disturbing and upsetting to some viewers. However, he soon becomes annoyed with the boy who will not stop crying, grabbing him by his face, raising his voice and telling the infant, 'Stop crying, calm down. "If I was the mother of that baby I wouldn't hesitate to push or slap the damn priest back".
"I wonder how many millions of kids suffer inappropriately aged "discipline" like this behind the scenes in religious families who believe this is biblically sanctioned, though", One woman wrote.
Another person said: "If that video would end with the father giving the priest a very strong bitch slap it would be flawless".
The congregation gasps and admonishes him for his treatment of the child.