Probably more than we think, although I know that doesn’t answer your question directly. (I don’t know how to measure the extent.) I do know that numerous commentators have called out the recent RNC’s fear-stoking rhetoric. Convention speakers talked about how Trump would save us from the chaos and destruction of Biden’s America, as if this were Biden’s America, as if Biden were president now and today’s disorder weren’t happening on Trump’s watch (and much of it actively caused by him).
I also listened to an interview with Rev. Rob Schenck (never heard of him before). He was told, as a Christian minister, that conservative fund-raisers needed to arouse more fear and anger in their audiences, because the more angry and afraid people were, the more money they would give.
https://thewayofimprovement.com/2020/06/16/a-former-member-of-the-christian-right-says-that-a-political-fundraiser-once-told-him-that-we-need-more-fear-and-more-anger-from-white-evangelicals/
That is more cynical than I ever thought Christians got, never mind garden-variety Republicans.