Exactly. Trump is just a symptom. If he disappeared tomorrow, the people who elected him are still here, and they still want the same things: Belligerence, Cruelty, Isolationism, and lots of other terrible things. When Trump is no longer in the picture, they'll find a new candidate who offers this.
Well, the isolationism is dubious. Trump and his followers (with a few exceptions, granted) seem happy to throw isolationism to the wind as soon as there's a chance of wielding power over a defeated enemy.
You don't have to convince every Trump voter. The margin who swung from Biden to Trump and elected Trump aren't all those things. They just don't want what the Dems were selling in 2024, specifically: the dems' adopted ideology surrounding gender, plus using race and gender to pick who gets jobs and into schools, rather than merit. If they removed just those two planks from the DNC platform, (1) Harris would have never been nominated, and (2) Trump couldn't have won.