They are going to find removing the invaders is almost impossible. By international law the receiving country has to agree to take them back. If they don’t then Italy can’t legally remove them. (The countries the invaders come from do not want them back.)
Italy has three choices, allow them to stay and suck on welfare, move them to concentration camps, or start shooting them. The only thing that will definitely stop the invasion and convince the invaders to leave on their own is shooting them. I don’t see that happening for a few more years. The West has become too soft and politically correct.
On the plus side, Italy is so financially strapped they don’t have the luxury of waiting very long or spending much more money. Bullets are cheap.
I agree with your point with respect to international law.
But I think international law is essentially unenforceable.
If Brussels makes a stink, they risk Italexit.
If the Italians are pissed enough - they will deport.