As I have said previously you are confusing immigration with the foreign ownership of Aus assets and the consequent risk that that poses to our national security not to mention our general wealth because virtually all the profits go overseas while the country is going deeper in debt.
Debt is a national security issue because like Greece & the Rep of Ireland post the GFC, once these countries could not service the debt, creditors sent in the IMF/EC/ECB to manage the country's budget thereby robbing it of economic sovereignty.
If Aus continues on its downward debt spiral and then faces a catalyst such as a global recession , we're brown bread, IMO.
What was supposed to be a "sweetheart budget" shows Aus budget in deficit out to 2032 which, IMO, is a tragedy!
RE: personal immigration:
We are a country of immigrants and we were the richest country in the world 1855-1880 in GDP/Capita when immigration was at its highest as a %age of population.
From 1900 until the 1950s while immigration was severely curtailed due to the White Australia Policy, our economy stagnated.
Post WW2 we had enormous immigration and the following decade, the 1960 saw an average annual GDP growth of 5%+; the best decades growth ever in Aus history.
Since then we have simply "sold the farm" and as a country we have been deprived of our resources' profits.
If you are a xenophobe just come out and say so rather than clouding your personal anti-immigration stance with foreign ownership of our resources; the former being beneficial to Aus economic growth and the latter the complete opposite, IMO,