Reference one thing when you believe another.

[Jenw977]

What is an idiom or phrase (funny) that is referring to someone pointing to something they don’t believe to make their point to you. Kind of like “that’s like an atheist quoting a Bible verse”

 

[Tarheel]

You want a humorous phrase indicating that somebody is being hypocritical.

I'm sure there are some, but none readily come to mind.

 

[tedmc]

irony/paradox

They don't practice what they preach.