The wife, described as open-minded by the dad, welcomed the OP into their religious household.
Even his 2 younger siblings have started questioning him, asking him why he doesnt attend church or pray.
As expected, this declaration caused significant tensions, anger and friction in the household.
However, thats not really how this works.
A child will always believe what they want to believe, no matter how much those beliefs are forced.
Religious differences within a family can sometimes lead to tension and strain in relationships.