What limits would be workable?
How about the limit on Mohammedan immigration being equal to the number who emigrate less the number of births to Muslims living in Australia? If you can keep the Mohammedans from breeding like cockroaches, the number dying will make Mohammedans an extinct army in Australia.
So someone finally said it.
All the western countries should totally stop all Muslim immigration.
They don't have to let people who's book tells them to replace the current government with sharia (Islamic law) into the country.
All Muslims by definition have to believe in sharia (Islamic law) That law says it must be supreme over all other law.