Stranger things have happened before in politics. But yes, you’re right that these old people are very entangled to the point where they seem untouchable. But that’s the point. That’s their job as politicians. The only way that changes is if enough people get sick and tired of it and demand change, especially when their future is being sacrificed to satisfy some small portion’s desire to keep a specific candidate on the ballot. If the party cannot stop this from ballooning they will eventually lose.
And you’re right, Trump is happy to see that. But by rejecting concerns and not talking about it, compromising, you will get more infighting, not less. And more infighting will not cause the issue to be resolved faster, it will lead to a situation like you saw in 2016, where apathy rose to such degrees that people voted for Trump out of spite. It’s a different situation now knowing what he is capable of, but you can’t look at that apathy being bred as not terrifying.
Because again, there’s a big chunk of people who just don’t care about all the terrible stuff he’s done to the degree they exclude him. What should have been sure democrat votes might be lost just to the insistence a specific candidate must represent them.