The vast majority of Christian religions don’t have anything against modern medicine.
The fact that a girl is now dead because of these extremists is heartbreaking.
There’s a popular parable/joke that’s often told among those who are religious about a devout man in a flood who rejects multiple rescuers while saying, “God will save me.” He then eventually drowns and complains to God. God then responds with something like, “What do you mean?! I sent 2 boats and a helicopter!” https://en.wikipedia.org/wiki/Parable_of_the_drowning_man
For Christianity in general, there’s a saying that we should first do everything we can and then leave the rest in God’s hands. There’s a whole section dedicated to this with the most relevant part:
What good is it, my brothers, if someone says he has faith but does not have works? Can that faith save him? (James 2:14)
Any Christian religion that chooses to ignore modern advances in medicine (be that vaccines, insulin, or whatever) shows that they’re ignoring a fairly obvious lesson that the rest of Christianity has already learned.
I had a cockatiel as a kid that would sing along with most of the Disney princesses.