This not a rare thing to express. There are a lot of people raised under conservative Christian environments who have spent a considerable amount of time recovering from this. It is not surprising that they feel the need to express something of the journey that has dominated much of their early life.
Taylor Tomlinson puts much of this into her comedy. She often asks the audience to call out if they were similarly screwed up by their religious upbringing. The is a loud audience response every time.
While I don't agree with Andrew Kelly's adversarial attitude, I do understand it a little more from the perspective of someone who had to fight his way out of an ideology that will not seek consensus with his values.
"an ideology that will not seek consensus with his values"
This just seems normal and expected.
Kids are raised by their parents. Parents try to impart their wisdom on their kids, often in the form of rules meant to protect them. These rules are necessarily over restrictive due to simplification during various ages. These rules are also out of date with the new generation.
It's always a right of passage for children to find their own values and how they align with ideologies they have experienced or discovered in the world. And kids thinking their parents messed them up is really just an expression of value mismatch.