Some people say the efforts by Liberal/Labor are to discourage a lot more refugees from overwhelming Australia. Resulting in increased crime, less jobs, etc. They acknowledge that some will suffer in the process.
Other points I noticed:
- Coming across as emotional about the harm and suffering on Nauru or escaping war, they will dismiss all arguments as immature and feel like they're being an adult to you.
- Some are persuaded by increased economic activity and net welfare investment benefits but want more screening but wouldn't know how to do this effectively.
Source: Asking random people about policies. Some people you can try asking: mechanics, tradies, checkout people, business people, asking people who handout stuff for Liberal/Labor. To get a deep understanding, read their sources, any of the Murdoch rags or right wing morning shows (ie Alan Jones).