Public perceptions of brands rarely stay static. Musicians and actors go in and out of favor with the public. What is cool one day, may be lame the next.
Once a critical mass starts to turn against Trump, it will bring others along for the ride. When MAGA folks see people they like and respect suddenly shit-talking the President on Facebook and X, it gives them a permission structure to do the same. Suddenly, their identity is no longer intertwined with supporting the President. And if that movement gains steam, it can be like a freight train heading down the tracks.
Trump intuitively knows this, and that is why he is trying to figure out a way out of Iran as fast as possible. But if gas prices continue to spike over the Spring, he may enter a death spiral that brings his support into the 20s or even the teens.