Irony
. . . we paid for 5 years at the University of Missouri Columbia . . .
You can appreciate the irony.
You
paid for the brainwashing.
She now "knows" much that isn't true. Real life will be (one hopes) the process whereby she unlearns most of that crap.
I don't have any solid advice. Your family dynamic will be unique, and using mine as a model will very likely fail.
I have a family member whose data sources are all hard Left, and whose "peers" lean that way, and having to work that problem requires a very light touch. The good news is that I established a solid affection for firearms there before the peer pressure got a toehold.
My job now is bringing some enlightenment to the "social" vector so that when it comes time to vote, the affection for firearms will carry more weight than the pressure to vote for people who will try to outlaw them.
It's a slow process. If I take any other approach than "bored, matter-of-fact" I lose ground. If I offer incisive factual arguments modulated with a "disinterested" tone, with the question, "so, where you getting your facts from?" I get better traction.
One of the things I say to my kids when they come to me with weird stuff is, "you know, I hate it when smart people get fooled." And then I go for the facts. And when the facts include tidbits like, "well, so-and-so is just plain crazy," I use the relaxed approach. "Really? That's a fact? What's the source on that?" And then, following the inevitable "everybody knows," I have to remind that "generalities are a foil, and I taught you better data analysis than that."
I don't get angry or impatient. I don't deal in generalities. I ask for facts, sources, and research that they, themselves, have done.
I remind them that I don't find group think (or mob think) persuasive. Let's stick to the facts.
And if your "truth" is the result of other people's prevailing opinions, realize that that's not a process for which I have a lot of respect.
Know your own truths, have the spine to stand for them.
Popularity is fleeting. The truth will be around a lot longer.