Fox news is specifically designed to target the elderly as their critical thinking skills are fading, targeting their most triggerable fears. Fox Brain is a known phenomena, one which can usually be reversed if easy access to Fox News is removed, as seen in this documentary.

I myself was able to stop my mother from going down that path with the help of a browser add-on that let me block right-wing rage bait news from showing up in her YouTube feed, which had an almost immediate and lasting effect.