Agreed, this was Spinoza's devastating argument against miracles. A miracle, being an interference with nature, would be God violating his own system, which is incoherent as a concept.
Listen to these mind-boggling 2010 statistics: In the U.S., 57% of Protestants can name the four gospels. 55% of Catholics know their tradition teaches that sacramental bread and wine become Christ’s body and blood. 53% of Protestants cannot identify Luther as the person who started the Protestant Reformation. But on Pew's religious knowledge survey, atheists/agnostics scored highest, then Jews:
U.S. Religious Knowledge Survey Black protestants and Hispanic Catholics score lowest, which is unsurprising as they are generally the most devout.
What about more recently, 2019? Here's this:
What Americans Know About Religion Interestingly, Jews scored higher than atheists here, but atheists were second on religious knowledge. Other interesting stats: Mormons were third in 2010, but dropped quite a lot. And in this, black protestants scored noticeably lower than "nothing in particular."
By the way, you can go to that website to take the quiz yourself so you know exactly what the questions were.
Here's the fact: Atheists know more about religion than religious people. The Bible is, for most Christians, like a software license (EULA): nobody reads it. They just scroll down to the bottom and hit I Agree.