As soon as Conservative former PM Abbott, and former Immigration Minister ScoMo were elected to govt in 2013 they introduced "immigration reform".
"Towed back the boats" arriving, towed back to Indonesia, set up a patrol system using the Navy, and stopped people smugglers and asylum seekers from arriving by boat...and emptied most of the detention centres.
No more boats, all gone.
Now all Trump's good immigration work is being undone.
The left just doesn't seem to understand about wise immigration policy in the modern world.