By reclassifying all these individuals as Schedule F, he actually has the means to do this and it is a key part of Project 2025. During his first term, he enacted Schedule F and it was repealed by the Biden admin. Trump intends on reintroducing it in a second term. So he has the means to make this one re-materialize and this time he'll actually have the staff to replace people with.

“Attempted murder. Now honestly what is that? Can you win a Nobel Prize for attempted chemistry?”

It's fundamentally dishonest - and also somewhat delusional - to discount threats even if they didn't come to pass one time. People doubted Trump would try to hold onto office, until he did.