It's more accurate to say, he wants (or claims to want) to. There is no guarantee that he will succeed, and in fact the numbers of people he would have to deport if he followed through on all his deportation promises (when you include all of the rhetoric about "illegal immigrants") are so large that the whole project appears to be absurd and entirely unfeasible from the get go. There is just no way you can deport millions of people without a massive mobilization effort.

The costs alone would be exorbitant, and on top of that it would take years with the current processes that are in place. They would need to change the laws and switch to much more aggressive, Nazi like tactics to do it, and that would provoke resistance. Yes they can probably crush that resistance if they are prepared to escalate the level of state and right wing militia violence, but in an already very unstable and polarized political environment that is a risky move...

I think Biden and Obama already did about as much deportation as they possibly could, and i expect Trump to do about the same amount. When he makes statements about all the people he's going to deport Trump is simply doing "right wing virtue signaling". It's rhetoric that plays well with his base, but that just like the promises of "re-industrialization", is probably going to be very hard to turn into reality, for practical reasons more so than political ones.

He's deporting proles. Same as before

Edit: proles and declassified, I should probably add