Different people react differently to various situations, but hopefully you understand why most people don't just dismiss or ignore statistics from other countries when it comes to COVID. This dovetails with my response to the second part of your post:
I get the impression you're talking about this "side of her" as if it were something to blame her for. Why? If you believe in freedom of choice and don't want to get vaccinated for any given reason, it shouldn't be difficult to see why she also has the freedom to refuse to hang out with unvaccinated people, friends or not. Some people may not mind it (I wouldn't mind it myself unless my friend stopped observing preventive measures), but she has children and could very well not be ready to take the increased risk of transmission to her or her children that comes from hanging out with an unvaccinated person.
Vaccines don't fully prevent transmission, but they do reduce the probability thereof. I view it as reasonable for a parent to want to avoid any extra risk even if that means not hanging out with unvaccinated friends, especially now that there are more transmissible variants of the virus circulating around. I would miss my vaccinated friends if they told me they'd rather wait until I was vaccinated to hang out with me, but I'd also understand and respect that. It's nothing personal; it's just that the virus doesn't care who is or isn't a friend when it infects someone.
You're free not to get vaccinated, but you're not free to impose this decision on anyone else. People are also free to choose who to hang out with based on medical consensus about probability of transmission from unvaccinated people compared to vaccinated ones.