Even those who aren’t surprised by the simple fact of Donald Trump’s assault on America’s universities must be shocked by the full frontal magnitude of it all, belated attempts to walk back parts of it, notwithstanding. (Harvard is putting up a courageous, clever, and effective defense.)
In my experience, it was in addition to. My high school biology teacher was a creationist who “taught the controversy”.
A very rare breed indeed
Depending on the state, getting teaching credentials is not challenging at all.