While I'd be incredibly curious - I'd probably treat them similar to everyone else. Why does it matter so much? There are all sorts of issues and views and realities that still exist that I'm generally flabbergasted by - there are still humans on the other end who may or may not be just as flabbergasted by a view you hold. I have family members and some friends with views that are literally incredible to me but that's not the focal point of our relationship. It's just an interesting thing.
Quick anecdote: When my wife and I lived in the DC area one of my wife's good gal friends came to visit and brought her doctor husband along. They're from the Midwest - where we are from and live now. Her husband has always been one of the nicest guys but he's always just been an acquaintance I suppose. But, when they came to stay with us, I got to know him better. Quite illuminating to say the least! We had been at the Natural History Smithsonian earlier in the day and when we were back at the apartment, he says to me out of the blue, "You know that old petrified wood and the meteorite we saw that is supposed to be millions of years old?" I say, "Yeah, pretty cool stuff, right?". He says, "Yeah but I don't believe any of that. Nothing is millions of years old. The oldest things are about 6000 years old." A man of science with all the schooling and he's a bona fide Young Earth creationist! We were able to chuckle and talk for quite awhile about that. He has his beliefs, I've said my piece, he's said his, he's still a great father/husband/friend/son/etc. The topic of YEC doesn't come up too much but it isn't taboo either (just have a lot of alcohol and sit around a fire and see what happens).
Apparently he's not alone as 38% of people per a 2017 Gallup poll believe "God created humans in their present form at one time within the last 10,000 years" and while it's older, a 2009 Harris poll found 18% believe the Earth is younger than 10,000 years old. Views on women's rights for their body, proper taxation levels, human involvement in climate change, homosexuality, marijuana's status as a Class I drug, Missouri, Montana, and Arizona still allow drivers to legally text and drive, hot dogs as sandwiches, if scoring a shorthanded goal should kill the rest of a penalty, mandatory personal finance education in high school, the blue/gold color of a dress, etc. - there will always be a ton of people who you disagree with on something.
If something is fundamental to your being that a different viewpoint is not tolerated, then by all means, do your thing.