While Mr Morrison has long been open about his faith, for the first time he allowed cameras into the Horizon Church in Sutherland as he and his family worshipped on Easter Sunday.
The images of Mr Morrison singing and waving his hands in the air or clapping attracted criticism and mockery online with one comparing them to a Hitler salute.
"It's disgusting. These grubs are gutless and they're keyboard warriors in their mother's basement trying to make heroes of themselves. But the great Australian people are much bigger than them."
Both leaders agreed to a campaigning truce over the weekend as they spent some time with family but attended several public events accompanied by media.
Opposition Leader Bill Shorten also attended an Anglican church service with his wife, children and mother-in-law Quentin Bryce in Brisbane on Sunday.
Mr Morrison also denounced anti-Adani coal mine protesters who compared working for the coal mine to working in Nazi Germany's gas chambers.
"Go and look on their social media contributions, you see a fair bit of that," Mr Morrison told reporters in Melbourne on Monday.
Anti-Adani protest organiser and former Greens leader Bob Brown said in a statement on Monday "I absolutely repudiate offensive comments such as those headlined in today's Murdoch press".
The WA branch of the CFMEU on Sunday posted a picture of Mr Morrison with his hand in the air, with the line "beware of false prophets (or should that be profits?)".
The tweet was later removed.