Your terminology isn’t right. The people who want the party dead are the UKIPPy entryists, who thought through the Brexit wars that they were supporting a party that wants to rip stuff up and destroy it all.
The traditional Tory voters are still the "don't make a fuss, Kenneth" sort. And while the likes of Braverman and Anderson have always been tolerated, they were never supposed to be taken seriously. And definitely never supposed to be in charge of shit. The traditional Tory voters just got a bit unlucky / complacent that for a decade or so, "don't make a fuss" has happened to align with the fever-dreams of a bunch of modern Robespierres.
"Conservative" is the actual silent majority of the UK. Not Lee Anderson's silent majority, but the real one. The ones who just want to be able to see a doctor if they need one, likes the BBC, puts a pound in the poppy tin, wore a mask through Covid, goes to a National Trust property every couple of months, was very sad when the Queen died and actually thinks that it's quite nice that people have rallied round that Syrian family who their kids have got to know at school. And who think about party politics approximately once every four or five years.
The middle-classness described sounds like a horrible pastiche, but those are the "traditional Tory voters" not the culture warriors who are demanding grand gestures over trans people or refugees.
The people you describe are just terribly upset to finally learn that their party doesn't want to tear down the Bastille, because the money that the council will have to spend to clean it up means their green bin will move to monthly collection.