Everyone has already posted brilliant suggestions.
I echo all here when I say - take things slowly. Simply share things that have "disturbed" you, without sounding bitter or negative.
Find a quote from some scientist that has been taken out of context, and show her the original full quote.
Share an observation about "things that don't seem quite right..."
Slowly step back from witness activity. Replace the time by doing fun things as a family. Go out for a nice day on a Sunday...show that life can be fun and refreshing by not being stuck on the witness treadmill..(but don't actually say that.)
This is a long game! Don't try and rush it, or force topics, or make her see things...or that will just have the opposite effect and cause her to dig her heels in.
Then, after some time, and by being a kind, patient and loving husband, she will see things for herself...