I do think illegal border crossings need to be addressed, but, my gut tells me that mass deportation is not the best way to deal with the issue.
So, I looked back at history when Eisenhower tried mass deportation to get some insight into how things worked back then.
Here is some information:
https://www.npr.org/sections/thetwo-...ration-wetback
https://www.history.com/news/operati...54-deportation