The problem is that, for some of them, their core beliefs are being attacked. It doesn’t matter if they’re wrong — these are things their parents, grandparents, aunts, uncles, cousins have told them in their formative years. This information from the first people they trust became a part of them. It’s bigger than Santa Claus or the Easter Bunny; they weren’t just stories to placate a child, they were things those adults believed to be true. As the world shrinks and changes, they can wonder if certain things about their community and their culture are nothing but foolish lies or reject that possibility. It’s easier to lash out than to consider that another worldview is equally valid or actually correct. Even when the evidence is overwhelming.
The solution to this problem is something we’ve sought for millennia.